CN104749444A - Grounding resistance measuring device - Google Patents

Grounding resistance measuring device Download PDF

Info

Publication number
CN104749444A
CN104749444A CN201310755033.2A CN201310755033A CN104749444A CN 104749444 A CN104749444 A CN 104749444A CN 201310755033 A CN201310755033 A CN 201310755033A CN 104749444 A CN104749444 A CN 104749444A
Authority
CN
China
Prior art keywords
microprocessor
earth resistance
grounding
sensor
communication
Prior art date
Application number
CN201310755033.2A
Other languages
Chinese (zh)
Inventor
孙巍巍
Original Assignee
孙巍巍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 孙巍巍 filed Critical 孙巍巍
Priority to CN201310755033.2A priority Critical patent/CN104749444A/en
Publication of CN104749444A publication Critical patent/CN104749444A/en

Links

Abstract

The invention relates to a multi-point grounding resistance measuring device, which is composed of a grounding device, emission pliers, receiving pliers, an emission pliers-shaped sensor, a receiving pliers-shaped sensor, a frequency conversion device, a program control device, a microprocessor, a display device and a communication device. The emission pliers-shaped sensor is connected with the frequency conversion device which is connected with the microprocessor; the receiving pliers-shaped sensor is connected with the program control device, which is connected with the microprocessor; the grounding device is connected to a conducting wire; and the microprocessor can be connected to the communication device and the display device. In order to solve three problems in the present method, noise interference is excluded by means of measuring multi-frequency points, the grounding device and a to-be-measured grounding point form a loop to prevent a working environment from being damaged by driving a ground pile, and a pliers-shaped grounding resistance measuring device is adopted to move nodes and measure the grounding resistance at different positions. Compared with an ordinary measuring method, the grounding measuring device has the advantages of being saved in cost, improved in precision and capable of displaying updated functions.

Description

A kind of earth resistance metering device

Technical field

The present invention relates to electric power electrical apparatus field, particularly relate to a kind of novel measurement of Grounding Resistance system.

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 size of grounding resistance weighs one of important indicator that whether grounded screen meet design requirement, and grounding resistance increases the effect that directly can affect lightning protection, even causes operation irregularity and the damage of system equipment.So the state understanding stake resistance is in real time necessary very much, and accurately to obtain Resistance of Grounding Grids value, the most important thing is the measuring method that GPRS is correct and technology.

In the method and technology of measurement of Grounding Resistance, noncontact measuring method and pincerlike method are more advanced one, have plurality of advantages.But, the resistance that tester records is the resistance in the whole loop comprising tested stake resistance.Such as a shaft tower is had to the situation of four grounded downlead, adopting jaw type ground resistance meter test result to be the loop resistance that four down conductors are formed, is not stake resistance.This is its limitation, needs effectively to utilize surrounding environment, could measure the earthed system of the overwhelming majority with it.

Pincerlike ground resistance table in use should notice that " noise " disturbs, the interference of " noise " interference and line-frequency induction, zero-sequence current, harmonic wave and spurious signal, very large on test accuracy impact; Whether single-point grounding should be noted, by geodesic line whether with equipment connection because there is no reliable ground loop during single-point grounding, need auxiliary pile conjunction measuring, and beat pile and can cause destruction to a certain degree to working environment; Should measuring position be noted, choose suitable measurement point, because different measurement results is all different.The result in most cases measured is also incorrect, only overcomes these difficult problems, the ground stud ground resistance actual value that the resistance value of measurement will could be surveyed close to us.

Summary of the invention

Therefore, the present invention proposes a kind of earth resistance metering device, solves existing method Problems existing.

One of this pick-up unit principal feature is the problem disturbed for " noise ", a measurement is adopted by multifrequency, interference current and measuring marking current are separated, make it not enter measuring system, to this eliminate by the interference of line-frequency induction, zero-sequence current, harmonic wave and spurious signal to measuring the error brought.

Another principal feature of this pick-up unit is the problem for not having reliable ground loop, by utilizing the earth point of electric main via the earth and earth point to be measured and form the stake resistance that earth point to be measured is measured in loop, wherein the earth point of electric main can conveniently obtain.

A this measurement mechanism again principal feature is the problem for measuring position, and carrying out node motion by utilizing pincerlike ground resistance measurement mechanism can measure diverse location, and the result obtained is more accurate.

The present invention realizes by the following technical solutions: this earth connection measurement plant by earthing device, launch pincers, receive pincers, launch pincerlike sensor, reception pincerlike sensor, converter plant, program control device, microprocessor, display device and communication device form.The pincerlike sensor of described transmitting is connected with converter plant, described converter plant is connected with microprocessor, the pincerlike sensor of described reception is connected with program-controlled transducer, described program-controlled transducer is connected with microprocessor, described earthing device is connected with wire, described microprocessor can connecting communication device, display device, and pincerlike sensor is launched in described transmitting clipper joint, and pincerlike sensor is launched in described reception clipper joint.

 

Accompanying drawing explanation

Fig. 1 is principle schematic of the present invention.

As shown in Figure 1: 1 is earthing device, 2 is launch pincerlike sensor, and 3 is converter plants, and 4 is communication devices, 5 is microprocessors, and 6 is receive pincerlike sensor, and 7 is program control devices, and 8 is display device, 9 is electric mains, and 10 is earth points to be measured, and 11 is launch pincers, and 12 is receive pincers.

 

Embodiment

Embodiment specific embodiments is as follows:

Earth connection measurement plant by earthing device (1), launch pincers (11), receive pincers (12), launch pincerlike sensor (2), receive pincerlike sensor (6), converter plant (3), program control device (7), microprocessor (5) and display device (8) and communication device (4) form.The pincerlike sensor of described transmitting (2) is connected with converter plant (3), described converter plant (3) is connected with microprocessor (5), the pincerlike sensor of described reception (6) is connected with program control device (7), described program control device (7) is connected with microprocessor (5), described microprocessor (5) can connecting communication device (4), display device (8), described transmitting pincers (11) connection launches pincerlike sensor (2), and described reception pincers (12) connection launches pincerlike sensor (6).

Described earthing device (1), connects the upper end of ground resistance wire to be measured, as the beginning of ground loop by wire.The earth point to be measured that the wire connected by this earthing device (1), earthing device, this wire connect, greatly, the ground wire of this electric main and the loop formed, to measure the stake resistance of tested point.

Described microprocessor (5), can control converter plant (3) and program control device (7), and signal can be exported to communication device (4) and display device (8).

The pincerlike sensor of described transmitting (2), utilizes Direct frequency synthesizer and discrete fourier technology, will differ from the sinusoidal wave frequency conversion voltage signal injection ground loop of undesired signal frequency.

The pincerlike sensor of described reception (6), utilizes genlock technology and integrated filter, the voltage in the ground loop required for collection, current signal.

Described converter plant (3), controls by microprocessor (5), in succession produces the multiple sine voltage signal differing from undesired signal frequency.

Described program control device (7), by Microprocessor S3C44B0X (5), adopts digital regulation resistance and Premium Plus programming amplifying technique, can automatic switching range.

Described display device (8), directly can show signal testing result.

Described communication device (4), can carry out down loading updating to microprocessor program.

 

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 (9)

1. an earth resistance metering device, is characterized in that: by earthing device, launch pincers, receive pincers, microprocessor, transmitting pincer sensor, receive pincerlike sensor, converter plant, program control device and display device, communication device forms; The pincerlike sensor of described transmitting is connected with converter plant, described converter plant is connected with microprocessor, the pincerlike sensor of described reception is connected with program-controlled transducer, described program-controlled transducer is connected with microprocessor, described earthing device is connected with wire, described microprocessor can connecting communication device, display device, and pincerlike sensor is launched in described transmitting clipper joint, and pincerlike sensor is launched in described reception clipper joint.
2. earth resistance metering device according to claim 1, is characterized in that: described earthing device, is connected the upper end of ground resistance wire to be measured, as the beginning of ground loop by wire.
3. earth resistance metering device according to claim 1, is characterized in that: described microprocessor, can control converter plant and program control device, and can export signal to communication device and display device.
4. earth resistance metering device according to claim 2, is characterized in that: the pincerlike sensor of described transmitting, utilizes Direct frequency synthesizer and discrete fourier technology, will differ from the sinusoidal wave frequency conversion voltage signal injection ground loop of undesired signal frequency.
5. earth resistance metering device according to claim 2, is characterized in that: the pincerlike sensor of described reception, utilizes genlock technology and integrated filter, the voltage in the ground loop required for collection, current signal.
6. earth resistance metering device according to claim 3, is characterized in that: described converter plant, by Microprocessor S3C44B0X, in succession produces the multiple sine voltage signal differing from undesired signal frequency.
7. earth resistance metering device according to claim 3, is characterized in that: described program control device, by Microprocessor S3C44B0X, adopts digital regulation resistance and Premium Plus programming amplifying technique, can automatic switching range.
8. earth resistance metering device according to claim 3, is characterized in that: described display device, signal testing result directly can be shown.
9. earth resistance metering device according to claim 3, is characterized in that: described communication device, can carry out down loading updating to microprocessor program.
CN201310755033.2A 2013-12-31 2013-12-31 Grounding resistance measuring device CN104749444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310755033.2A CN104749444A (en) 2013-12-31 2013-12-31 Grounding resistance measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310755033.2A CN104749444A (en) 2013-12-31 2013-12-31 Grounding resistance measuring device

Publications (1)

Publication Number Publication Date
CN104749444A true CN104749444A (en) 2015-07-01

Family

ID=53589426

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310755033.2A CN104749444A (en) 2013-12-31 2013-12-31 Grounding resistance measuring device

Country Status (1)

Country Link
CN (1) CN104749444A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104931792A (en) * 2015-06-23 2015-09-23 中山市木易万用仪器仪表有限公司 Clamp-shaped insulation resistance test device
CN105445560A (en) * 2015-11-26 2016-03-30 国家电网公司 Grounding resistor tester measurement method based on ZC-8 type

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08248076A (en) * 1995-03-14 1996-09-27 Tohoku Denki Hoan Kyokai Arithmetic expression type grounding resistance measuring instrument
CN2809654Y (en) * 2005-06-24 2006-08-23 宋国娥 Double-jaw ground resistance tester
CN1828313A (en) * 2006-02-21 2006-09-06 武汉高压研究所 Pole tower earthing resistance quick testing method without unfastening wire and device
CN201508392U (en) * 2009-07-16 2010-06-16 福建省普华电子科技有限公司 Frequency-conversion grounding resistance measuring instrument
CN201576056U (en) * 2009-09-18 2010-09-08 山东电力集团公司潍坊供电公司 Grounding resistance online detector based on TMS320LF2407A
CN201780335U (en) * 2010-01-04 2011-03-30 广东电网公司广州供电局 Ground resistance detecting device of overhead transmission line pole tower
CN102680798A (en) * 2012-02-28 2012-09-19 山东建筑大学 Online measurement method and device for grounding resistor of rod tower

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08248076A (en) * 1995-03-14 1996-09-27 Tohoku Denki Hoan Kyokai Arithmetic expression type grounding resistance measuring instrument
CN2809654Y (en) * 2005-06-24 2006-08-23 宋国娥 Double-jaw ground resistance tester
CN1828313A (en) * 2006-02-21 2006-09-06 武汉高压研究所 Pole tower earthing resistance quick testing method without unfastening wire and device
CN201508392U (en) * 2009-07-16 2010-06-16 福建省普华电子科技有限公司 Frequency-conversion grounding resistance measuring instrument
CN201576056U (en) * 2009-09-18 2010-09-08 山东电力集团公司潍坊供电公司 Grounding resistance online detector based on TMS320LF2407A
CN201780335U (en) * 2010-01-04 2011-03-30 广东电网公司广州供电局 Ground resistance detecting device of overhead transmission line pole tower
CN102680798A (en) * 2012-02-28 2012-09-19 山东建筑大学 Online measurement method and device for grounding resistor of rod tower

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104931792A (en) * 2015-06-23 2015-09-23 中山市木易万用仪器仪表有限公司 Clamp-shaped insulation resistance test device
CN105445560A (en) * 2015-11-26 2016-03-30 国家电网公司 Grounding resistor tester measurement method based on ZC-8 type

Similar Documents

Publication Publication Date Title
CN102183694B (en) There is the earth ground tester of Long-distance Control
EP2985613A1 (en) Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network
CN103293443B (en) A kind of distribution network overhead line Earth design method
CN102128988B (en) Method of measuring earth ground resistance of a pylon using a single clamp
CN107255759A (en) A kind of electric vehicle alternating-current charging pile automatic checkout system
CN103217584B (en) The measuring method of large-scale grounding network impedance ground
CN102680798B (en) Online measurement method and device for grounding resistor of rod tower
CA2783294C (en) Line fault detector
CN101266270B (en) Pile foundation tower-footing impedance measuring apparatus and its method
CN103698695B (en) The method of testing that a kind of multifunctional high pressure breaker electrical characteristic test device is performed
CN102608388B (en) VFTO (very fast transient overvoltage) measurement method and system
CN202494775U (en) Calibrator for DC system insulation device
CN104614668A (en) Circuit board testing system
CN204731317U (en) A kind of intelligentized earth resistance tester
US20140247063A1 (en) Earth Ground Tester With Remote Control
CN103792433B (en) With the low amplitude value impulse resistance measuring method of spark coefficient correction tower grounding device
CN201892707U (en) Measuring system for electric field
CN102650685B (en) Method for assessing technical parameters of TEV (Transient Earth Voltage) partial discharge testing instruments for power systems
CN203324381U (en) Portable pole tower grounding device impulse grounding resistance measuring device
CN104155536B (en) The system and method that integrity test is carried out to the power grid in aircraft
CN104569608B (en) A kind of Transient grounding resistance on-site measurement method based under heavy impulse current
CN102072999B (en) Connection testing device of electric energy metering device and using method thereof
CN108020725B (en) A kind of earth mat impulse earthed resistance measurement method under the influence of different soils pH value
CN201654130U (en) Automatic measuring and calibrating device of high-impedance measuring apparatus
RU2624614C2 (en) Test system of dynamic modeling of electromagnetic transition process of thunderstorm

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20150701

RJ01 Rejection of invention patent application after publication