CN203929896U - Anti-explosion digital earth resistance tester - Google Patents
Anti-explosion digital earth resistance tester Download PDFInfo
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- CN203929896U CN203929896U CN201420180013.7U CN201420180013U CN203929896U CN 203929896 U CN203929896 U CN 203929896U CN 201420180013 U CN201420180013 U CN 201420180013U CN 203929896 U CN203929896 U CN 203929896U
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- 238000004880 explosion Methods 0.000 title claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000002689 soil Substances 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 12
- 239000004020 conductor Substances 0.000 abstract description 11
- 238000013461 design Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model relates to a kind of anti-explosion digital earth resistance tester, mainly solves that existing common earth resistance meter can not be used in explosion risk gaseous environment, measuring accuracy is low, the problem of poor anti jamming capability, function singleness.The utility model is by adopting a kind of anti-explosion digital earth resistance tester, comprise panel and keypad (1), battery component (4) and mainboard (2), between mainboard (2) and battery component (4), be provided with under-voltage protection plate (3), panel and keypad (1) is connected with mainboard (2) by wire, battery component (4) is connected by wire with under-voltage protection plate (3), under-voltage protection plate (3) is connected by wire with mainboard (2), the technical scheme that panel and keypad (1) is provided with the terminal for being connected with test probe has solved the problems referred to above preferably, can be used for measurement of Grounding Resistance under explosion risk gaseous environment, low resistance conductor resistance, in soil resistivity and interchange ground voltage.
Description
Technical field
The utility model relates to a kind of anti-explosion digital earth resistance tester.
Background technology
Common earth resistance meter, mainly for the production of on-the-spot lightning protection resistance measurement.CN201220222817 discloses a kind of earth resistance metering device, comprises reometer, voltage table, power supply and tested grounding body, and described tested grounding body is connected with voltage pole by voltage table; Described tested grounding body is extremely connected with electric current by reometer, power supply; Between described reometer and power supply, be provided with isolating transformer; Between described voltage pole and tested grounding body, interval is 20 meters, and between the described electric current utmost point and tested grounding body, interval is 40 meters; Described voltage pole and the electric current utmost point are probe, and described voltage table is the voltage table that internal resistance is less, magnitude of voltage scale is thinner, and described power supply is AC power.
Along with the management of modern enterprise and the requirement of production, common earth resistance meter can not meet all requirements far away, because common earth resistance meter cannot be used in explosion risk gas place, and common earth resistance meter measuring accuracy is low, poor anti jamming capability, cannot meet the requirement to precision in in-site measurement.In addition, common earth resistance meter function singleness, cannot meet the requirement of measurement of Grounding Resistance, low resistance conductor resistance, soil resistivity and interchange ground voltage simultaneously.
Summary of the invention
Technical problem to be solved in the utility model is in prior art, to exist common earth resistance meter to use in explosion risk gas place, and common earth resistance meter measuring accuracy is low, poor anti jamming capability, cannot meet the requirement to precision in in-site measurement, common earth resistance meter function singleness, cannot meet the problem of measurement of Grounding Resistance, low resistance conductor resistance, soil resistivity and the requirement of interchange ground voltage simultaneously, a kind of new anti-explosion digital earth resistance tester is provided.This tester is for measurement of Grounding Resistance, low resistance conductor resistance, soil resistivity under explosion risk gaseous environment and exchange ground voltage, have advantages of can in explosion risk gaseous environment, use, measuring accuracy is high, antijamming capability is strong, can while measurement of Grounding Resistance, low resistance conductor resistance, soil resistivity and interchange ground voltage.
For addressing the above problem; the technical solution adopted in the utility model is as follows: a kind of anti-explosion digital earth resistance tester; comprise panel and keypad (1), battery component (4) and mainboard (2); between mainboard (2) and battery component (4), be provided with under-voltage protection plate (3); panel and keypad (1) is connected with mainboard (2) by wire; battery component (4) is connected by wire with under-voltage protection plate (3); under-voltage protection plate (3) is connected by wire with mainboard (2), and panel and keypad (1) is provided with the terminal for being connected with test probe.
In technique scheme, preferably, described panel and keypad (1) is provided with four terminals for being connected with test probe.
In technique scheme, preferably, described panel and keypad (1) is provided with display screen.
In the utility model, described panel and keypad (1) adopts essential safe type design, and major function is to carry out the switching of each function gear, to realize the demand of different tests; Press gear button, corresponding gear pilot lamp can be lighted, and mainboard (2) can enter corresponding test pattern simultaneously; Mainboard (2) adopts essential safe type to add encapsulation design, major function is to realize the acquisition filter of test signal, accurate amplification processing, AD transition count, demonstration in real time, and the output of control survey electric current size, dynamically adjust noise reduction multiple, according to panel operation, with electronic switch mode running mode switching; Described battery component (4) adopts essential safe type design, for tester provides power source; Described under-voltage protection plate (3) designs for pouring type; Described tester is according to < < GB3836.1-2010 explosive atmosphere part 1: Device-General requires > >, < < GB3836.4-2010 explosive atmosphere the 4th part: the design of being correlated with by the equipment > > standard of essential safe type " i " protection; The sampling processing circuit of described mainboard (2), is used precision switch capacitor filter, and multistage senior bandpass filter adopts Phase Locked Loop Synchronization to follow the tracks of detecting way simultaneously, to solve the on-the-spot power frequency occurring, wireless high-frequency interference; The data converting circuit of described mainboard (2), is used high-quality AD to turn device, coordinates algorithm process, can reach 12 above precision.
Tester of the present utility model is owing to being provided with under-voltage protection plate (3) in the middle of mainboard (2) and battery component (4), and included panel and keypad (1), battery component (4) adopts essential safe type design, under-voltage protection plate (3) adopts essential safe type design, mainboard (2) adopts essential safe type to add encapsulation design, can use existing under explosion risk gaseous environment, energy is measurement of Grounding Resistance simultaneously, low resistance conductor resistance, soil resistivity and interchange ground voltage, can reach 12 above measuring accuracy, the sampling processing circuit of plate (2), use precision switch capacitor filter, multistage senior bandpass filter, adopt Phase Locked Loop Synchronization to follow the tracks of detecting way simultaneously, to solve the on-the-spot power frequency occurring, wireless high-frequency disturbs, obtained good technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of tester described in the utility model;
In Fig. 1: 1 is panel and keypad; 2 is mainboard; 3 is under-voltage protection plate; 4 is battery component.
Fig. 2 is the principle schematic of measurement of Grounding Resistance in the utility model embodiment 1;
In Fig. 2: E is ground-electrode; P is potential probes; C is current probe; L is the horizontal range between electrode or probe; C2, P2 are the connection terminal being connected with ground-electrode E wire; P1 is the connection terminal being connected with potential probes P wire; C1 is the connection terminal being connected with current probe C wire.
Fig. 3 is the principle schematic of measuring low resistance conductor resistance in the utility model embodiment 2;
In Fig. 3: R is low resistance conductor; C2, P2, P1, C1 are the connection terminal on panel and keypad 1.
Fig. 4 measures the principle schematic of soil resistivity in the utility model embodiment 3.
In Fig. 4: L is the horizontal range between probe; C2, P2, P1, C1 are the connection terminal on panel and keypad 1.
Below by embodiment, the utility model is further elaborated, but is not limited only to the present embodiment.
Embodiment
[embodiment 1]
At tester as shown in Figure 1, panel and keypad (1) is connected with mainboard (2) by keyboard chord, and battery component (4) is connected by wire with under-voltage protection plate (3), and under-voltage protection plate (3) is connected by wire with mainboard (2).
Described panel and keypad (1) adopts essential safe type design, and major function is to carry out the switching of each function gear, to realize the demand of different tests; Press gear button, corresponding gear pilot lamp can be lighted, and mainboard (2) can enter corresponding test pattern simultaneously.Panel and keypad (1) is provided with and measured object ground-electrode E(C2, P2), potential probes P1, current probe C(C1) four four terminals that test probe is connected, between test electrode and terminal, with wire, be connected.
Described battery component (4) adopts essential safe type design, for tester provides power source, has adopted 6V(1.5V*4 joint) dry cell composition.
Described under-voltage protection plate (3), for pouring type designs, is realized power management function, and current supply voltage is detected, and lights pilot lamp during lower than 4.5V and reminds, to change in time battery when voltage; Battery is crossed and put row protection into, when battery voltage, be down to 4V when following, cut off power supply, to prevent that electric battery from crossing, put the battery damage causing.
Described mainboard (2) adopts essential safe type to add encapsulation design, major function is to realize the acquisition filter of test signal, accurate amplification processing, AD transition count, demonstration in real time, and the output of control survey electric current size, dynamically adjust noise reduction multiple, according to panel operation, with electronic switch mode running mode switching.
In technique scheme, preferably, described panel and keypad (1) is provided with four terminals for being connected with test probe.
Described tester is according to < < GB3836.1-2010 explosive atmosphere part 1: Device-General requires > >, < < GB3836.4-2010 explosive atmosphere the 4th part: the design of being correlated with by the equipment > > standard of essential safe type " i " protection.
The sampling processing circuit of described mainboard (2), is used precision switch capacitor filter, and multistage senior bandpass filter adopts Phase Locked Loop Synchronization to follow the tracks of detecting way simultaneously, to solve the on-the-spot power frequency occurring, wireless high-frequency interference.
The data converting circuit of described mainboard (2), is used high-quality AD to turn device, coordinates algorithm process, can reach 12 above precision.
During measurement of Grounding Resistance, as shown in Figure 2, along tested ground-electrode E(C2, P2) and potential probes P(P1) and current probe C(C1), according to straight line, each other at a distance of L=20 rice, make potential probes P1 in E, C centre position, on request probe is inserted to the earth.With special wire by tester terminal E(C2, P2), P1, C1 connection corresponding to probe position.
Ground resistance meter power switch " ON " on openable panel keyboard (1), selects suitable gear, and once this grade of beacon lamp of key is bright for flicking, and the numerical value in the upper LCD display of panel and keypad (1) is the earth resistance being recorded.
[embodiment 2]
According to the condition described in embodiment 1, just described tester is used for to measuring low resistance conductor resistance, as shown in Figure 3, with special wire by tester terminal E(C2, P2), C(C1, P1) connection corresponding to low resistance conductor R, measuring method is consistent with the stake resistance operation in embodiment 1, and the numerical value in the upper LCD display of panel and keypad (1) is the conductor resistance being recorded.
[embodiment 3]
According to the condition described in embodiment 1, just described tester is used for measuring soil resistivity, as shown in Figure 4, during measurement, in tested soil, along straight line, insert four probes, and each probe spacing is equated, the distance of each spacing is L=2000cm, and requiring probe to enter the ground degree of depth is L/20cm, with wire, is connected respectively from C1, P1, each terminal of P2, C2 with four probes.If it is R that ground resistance meter is measured resistance value, soil resistivity is calculated as follows:
Ф=2πRL
Wherein:
Ф-soil resistivity (Ω cm)
Distance between L-probe and probe (cm)
The reading of R-ground resistance meter (Ω)
The soil resistivity recording can be similar to thinks to be embedded in the average soil resistivity in region between probe.
[embodiment 4]
According to the condition described in embodiment 1, just described tester is used for measuring interchange ground voltage, as shown in Figure 2, pull out C1 plug, E(C2, P2), the plug between P1 retains, start ground voltage (EV) shelves, pilot lamp is bright, and the numerical value reading in LCD display is the interchange ground voltage value between E, P1.
Claims (3)
1. an anti-explosion digital earth resistance tester; comprise panel and keypad (1), battery component (4) and mainboard (2); it is characterized in that being provided with under-voltage protection plate (3) between mainboard (2) and battery component (4); panel and keypad (1) is connected with mainboard (2) by wire; battery component (4) is connected by wire with under-voltage protection plate (3); under-voltage protection plate (3) is connected by wire with mainboard (2), and panel and keypad (1) is provided with the terminal for being connected with test probe.
2. anti-explosion digital earth resistance tester according to claim 1, is characterized in that described panel and keypad (1) is provided with four terminals for being connected with test probe.
3. anti-explosion digital earth resistance tester according to claim 1, is characterized in that described panel and keypad (1) is provided with display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420180013.7U CN203929896U (en) | 2014-04-11 | 2014-04-11 | Anti-explosion digital earth resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420180013.7U CN203929896U (en) | 2014-04-11 | 2014-04-11 | Anti-explosion digital earth resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203929896U true CN203929896U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420180013.7U Expired - Lifetime CN203929896U (en) | 2014-04-11 | 2014-04-11 | Anti-explosion digital earth resistance tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414976A (en) * | 2018-01-17 | 2018-08-17 | 石化盈科信息技术有限责任公司 | Explosion-proof type bluetooth positioning device |
| CN109917190A (en) * | 2018-12-29 | 2019-06-21 | 天津高德朗益科技有限公司 | A kind of intelligent monitor system based on insulating resistance measuring |
-
2014
- 2014-04-11 CN CN201420180013.7U patent/CN203929896U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414976A (en) * | 2018-01-17 | 2018-08-17 | 石化盈科信息技术有限责任公司 | Explosion-proof type bluetooth positioning device |
| CN109917190A (en) * | 2018-12-29 | 2019-06-21 | 天津高德朗益科技有限公司 | A kind of intelligent monitor system based on insulating resistance measuring |
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Granted publication date: 20141105 |
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| CX01 | Expiry of patent term |