CN209342813U - Earth resistance tester - Google Patents
Earth resistance tester Download PDFInfo
- Publication number
- CN209342813U CN209342813U CN201822022421.0U CN201822022421U CN209342813U CN 209342813 U CN209342813 U CN 209342813U CN 201822022421 U CN201822022421 U CN 201822022421U CN 209342813 U CN209342813 U CN 209342813U
- Authority
- CN
- China
- Prior art keywords
- shell
- connect
- controller
- earth resistance
- resistance tester
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses earth resistance testers, including shell, it further include the LCD display that surface of shell is set, two ac output end jacks, two tested end jacks, control button and key, the acoustooptic alarm of housing upper surface is set, the supply hub of shell right side is set, controller inside housings is set, and resistance measuring module connected to the controller, current regulating module and driving circuit, the driving circuit is connect with current regulating module, the current regulating module is connect with resistance measuring module, the acoustooptic alarm, control button, key and LCD display are connect with controller, one connection current probe of the ac output end jack, another ground connection, described tested end jack one connect with voltage probe, another ground connection.The utility model is easy to operate, has anti-interference ability, and the accuracy of test result is high.
Description
Technical field
The utility model relates to a kind of testers, specifically, being to be related to a kind of earth resistance tester.
Background technique
There are three pins, i.e. firewire, zero curve and ground line on family's plug of some large sizes, fiery in actual use
Line and zero curve can just be such that household electrical appliances work normally, and ground line is grounded electric appliance, play a protective role；Electric appliance ground connection, which also can guarantee, to be made
The personal safety of user, in electric appliance internal electrical losses, electric current can be guided into the earth by grounding technology, protect a user from electric shock.
It is whether good in order to detect ground state, it needs to test ground resistance using resistance meter, ground resistance size directly embodies
The good degree that electric device is contacted with " ground ", also reflects the scale of grounded screen, and earth resistance tester groundwork is former
Reason is: the electric appliance generates an electric current output, which is connect by probe at tested earth mat both ends, and electric current passes through earth mat electricity
Resistance forms a voltage signal, calculates ground resistance finally by voltage signal and current signal.
Currently, the modes measurement of Grounding Resistance such as hand-rail type ground resistance table, ground insulation ohmmeter are mainly used in the power system,
The latter needs to be arranged voltage pole and electric current pole in measurement, and in order to reduce error, down conductor must and protected object
It disconnects, so that cumbersome, the heavy workload of test, and it is often subject to the interference of outer signals in test, it influences to examine
The effect of survey；There is volumes when tester simultaneous it is larger, inconvenient to carry the disadvantages of.
Summary of the invention
The purpose of this utility model is to provide a kind of earth resistance tester, solve existing tester it is cumbersome,
The bad problem of test effect.
To achieve the above object, the technical solution adopted in the utility model is as follows:
Earth resistance tester, including shell further include the LCD display that surface of shell is arranged in, two exchange outputs
Jack, two tested end jacks, control button and key are held, the acoustooptic alarm of housing upper surface is set, is arranged in shell
Controller inside housings and resistance measuring module connected to the controller, electric current tune is arranged in the supply hub of right side
Section module and driving circuit, the driving circuit are connect with current regulating module, the current regulating module and resistance measurement mould
Block connection, the acoustooptic alarm, control button, key and LCD display are connect with controller, and the ac output end is inserted
One, hole connection current probe, another ground connection, the tested end jack one is connect with voltage probe, another is grounded.
Further, the current regulating module includes sequentially connected relay, pressure regulator, current sampling module, electricity
Stream amplifier, filter and A/D converter, the supply hub are connect with relay, the input terminal of the driving circuit and control
Device connection, output end and relay processed connect, and the A/D converter is connect with controller.
Further, the resistance measuring module includes voltage sampling module, and the voltage connecting with voltage sampling module is put
Big device, comparison circuit connected to the controller are connected to the alarm resistance initialization circuit of the input terminal of the comparison circuit, described
The output end of voltage amplifier is connect with filter and comparison circuit respectively.
Further, the left side and right side of the shell are provided with heat release hole.
Further, the model LPC1114F of the controller.
Further, the upper surface of the shell is provided with handle.
Further, the outer surface of the shell is coated with polyvinyl chloride resin layer, and modeling is fixed on the inner sidewall of shell
Strand foam plate.
Compared with prior art, the utility model has the following beneficial effects:
(1) the utility model is coated with polyvinyl chloride resin layer by the outer surface in shell, improves anti-inside tester
Interference performance, and filter filtering interference signals are provided in current regulating module, reduce external signal to test result
It influences, and during use, it is only necessary to probe is connected on measured object, then adjust testing time and alarm resistance, just
The test that measured object ground resistance can be achieved, efficiently solves that the cumbersome of existing tester, test effect are bad to ask
Topic, has reached effect easy to operate, has improved work efficiency, and had anti-interference ability, to improve the accurate of test result
Degree.
(2) the utility model is provided with heat release hole in the left side of shell and right side, can form the convection current of air, will
The heat discharge that tester internal components generate, enables tester to work normally.
(3) the utility model is fixed with plastic foam plate on the inner sidewall of shell, when tester is hit, can have
Effect protection internal components are not damaged, avoid the occurrence of the case where circuit connection loosens.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the functional block diagram inside the utility model.
Wherein, the corresponding title of appended drawing reference are as follows:
1- shell, 2-LCD display screen, 3- ac output end jack, the tested end jack of 4-, 5- supply hub, 6- control are pressed
Button, 7- heat release hole, 8- key, 9- handle, 10- acoustooptic alarm.
Specific embodiment
The utility model is described in further detail with embodiment for explanation with reference to the accompanying drawing, and the mode of the utility model includes
But it is not limited only to following embodiment.
Embodiment
As shown in Figs. 1-2, earth resistance tester disclosed by the utility model, including shell 1 further include being arranged in shell
LCD display 2, ac output end jack 3, tested end jack 4, control button 6 and the key 8 on 1 surface, are arranged on shell 1
The supply hub 5 of 1 right side of shell is arranged in the acoustooptic alarm 10 on surface, and the controller inside shell 1 is arranged in, and
Resistance measuring module, current regulating module and driving circuit connected to the controller, the model LPC1114F of the controller,
The driving circuit is connect with current regulating module, and the current regulating module is connect with resistance measuring module, and the acousto-optic is alert
Report device 10, control button 6, key 8 and LCD display 2 are connect with controller, and the ac output end jack 3 is provided with two
A, a connection current probe, another ground connection, there are two tested end jack 4 settings, one connect with voltage probe,
Another ground connection.
Specifically, the current regulating module includes sequentially connected relay, pressure regulator, current sampling module, electric current
Amplifier, filter and A/D converter, the supply hub 5 are connect with relay, the input terminal of the driving circuit and control
Device connection, output end and relay connect, and the A/D converter is connect with controller；The 220V alternating current of supply hub input
To pressure regulator, pressure regulator adjusts output size of current, obtains current sampling signal by current sampling module, then put by electric current
Big device amplifies signal, and the analog signal of electric current is finally converted to data-signal and passed by filter to filtering interference signals
It is defeated by controller.
Specifically, the resistance measuring module includes voltage sampling module, the voltage amplification connecting with voltage sampling module
Device, comparison circuit connected to the controller are connected to the alarm resistance initialization circuit of the input terminal of the comparison circuit, the electricity
The output end of pressure amplifier is connect with filter and comparison circuit respectively；The electric current of current sampling module is transferred to voltage sampling
The input terminal of module, voltage probe are connected to the input terminal of voltage sampling module, are then obtained by voltage amplifier to sampling
Voltage signal amplify, amplified signal is transferred to filter and comparison circuit, and section is preparatory in resistance measuring module
Setting alarm resistance, compares the ground resistance measured and alarm resistance in comparison circuit, if more than alarm resistance or tested end
Open circuit then controls acoustooptic alarm 10 by controller and starts, and the size of comparison resistance is substantially exactly the size of comparison voltage.
In order to enhance the device heat dissipation effect inside earth resistance tester, the left side and right side of the shell 1 are equal
It is provided with heat release hole 7, the convection current of inner air can be increased；The upper surface of the shell 1 is provided with handle 9, is convenient for carrying；It is described
The outer surface of shell 1 is coated with polyvinyl chloride resin layer, has strong anti-interference ability, to improve detection effect；In shell 1
Inner sidewall on be fixed with plastic foam plate, plastic foam plate has good protective effect, benefit to the intracorporal circuit devcie of shell
In popularization and use.
The utility model is provided with key 8, and for adjusting regular time, during the test, measured object is in electric current
Under the test current effect of adjustment module output, can control driving circuit by controller when reaching regular time makes relay
Device stops working, and does not power to pressure regulator, to cut off the output electric current of current sampling module；If there is the resistance value measured height
When alarming resistance or being tested end open circuit, output electric current can be also cut off；The control button 6 of setting for start tester work or
Reset test instrument in abnormal cases；The LCD display 2 of setting is used to show the current value and resistance of the time of test, test
Value.
The utility model by above-mentioned design, it is bad to efficiently solve the cumbersome of existing tester, test effect
The problem of, it is coated with polyvinyl chloride resin layer in the outer surface of shell, and filter is provided in current regulating module, both
There is preferable anti-interference ability, reduces influence of the external signal to test result, and during use, it is only necessary to connect probe
It connects on measured object, then adjusts testing time and alarm resistance, so that it may which the test for realizing measured object ground resistance has reached behaviour
Make easy effect, improves work efficiency, and have anti-interference ability, to improve the accuracy of test result.
The utility model is the improvement based on hardware architecture, and used electronic device and module are the prior art, and
It can directly be obtained by buying, the content reasonable employment that those skilled in the art can record according to specification, the utility model
Its specific configuration is repeated no more.
Above-described embodiment is only one of preferred embodiments of the present invention, should not be taken to limit the utility model
Protection scope, as long as the utility model body design thought and mentally make have no the change of essential meaning or profit
Color, it is solved the technical issues of it is still consistent with the utility model, the protection scope of the utility model should all be included in
Within.
Claims (7)
1. earth resistance tester, including shell (1), which is characterized in that further include that the LCD being arranged on shell (1) surface is shown
Shield (2), two ac output end jacks (3), two tested ends jack (4), control button (6) and key (8), is arranged in shell
(1) acoustooptic alarm (10) of upper surface, is arranged the supply hub (5) in shell (1) right side, and setting is internal in shell (1)
Controller and resistance measuring module connected to the controller, current regulating module and driving circuit, the driving circuit with
Current regulating module connection, the current regulating module are connect with resistance measuring module, and the acoustooptic alarm (10), control are pressed
Button (6), key (8) and LCD display (2) are connect with controller, and (3) connection electric currents of the ac output end jack are visited
Needle, another ground connection, the tested end jack (4) one is connect with voltage probe, another is grounded.
2. earth resistance tester according to claim 1, which is characterized in that the current regulating module includes successively connecting
Relay, pressure regulator, current sampling module, current amplifier, filter and the A/D converter connect, the supply hub (5) with
Relay connection, the input terminal of the driving circuit is connect with controller, output end and relay connect, the A/D converter
It is connect with controller.
3. earth resistance tester according to claim 1, which is characterized in that the resistance measuring module includes that voltage takes
It is electric to be connected to the comparison for egf block, the voltage amplifier connecting with voltage sampling module, comparison circuit connected to the controller
The alarm resistance initialization circuit of the input terminal on road, the output end of the voltage amplifier connect with filter and comparison circuit respectively
It connects.
4. earth resistance tester according to claim 1, which is characterized in that the left side and right side of the shell (1)
Face is provided with heat release hole (7).
5. earth resistance tester according to claim 3, which is characterized in that the model of the controller
LPC1114F。
6. earth resistance tester according to claim 4, which is characterized in that the upper surface of the shell (1) is provided with
Handle (9).
7. earth resistance tester according to claim 6, which is characterized in that the outer surface of the shell (1) is coated with poly-
Vinyl chloride resin layer is fixed with plastic foam plate on the inner sidewall of shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822022421.0U CN209342813U (en) | 2018-12-04 | 2018-12-04 | Earth resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822022421.0U CN209342813U (en) | 2018-12-04 | 2018-12-04 | Earth resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209342813U true CN209342813U (en) | 2019-09-03 |
Family
ID=67750412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822022421.0U Active CN209342813U (en) | 2018-12-04 | 2018-12-04 | Earth resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209342813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269062A (en) * | 2020-09-14 | 2021-01-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Valve section module element impedance tester |
-
2018
- 2018-12-04 CN CN201822022421.0U patent/CN209342813U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269062A (en) * | 2020-09-14 | 2021-01-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Valve section module element impedance tester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7436087B2 (en) | Power line conditioner | |
| WO2015085812A1 (en) | Apparatus for measuring cell internal resistance online and measurement method therefor | |
| CN209342813U (en) | Earth resistance tester | |
| CN207817124U (en) | A kind of electric connector leakage current and insulation resistance measuring device | |
| CN205643448U (en) | Intelligent electric power safety inspection device | |
| CN208984671U (en) | A kind of electronic product production finished product test device | |
| CN207882360U (en) | A kind of Portable AC charging pile comprehensive tester | |
| CN209342812U (en) | A kind of earth-continuity tester | |
| CN105258729A (en) | Temperature and humidity detection system for switch cabinet based on single chip microcomputer | |
| CN207636728U (en) | A kind of dc-battery internal resistance Acquisition Instrument of simplified four-wire method | |
| CN216117980U (en) | Three-phase zinc oxide calibrating device capable of realizing multi-point touch for detection of zinc oxide lightning arrester | |
| CN207037008U (en) | Insulating check instrument and insulating check system | |
| CN212843719U (en) | Portable resistance welding measuring device | |
| CN111366888A (en) | Intelligent electric energy meter field metering fault rapid detection method and detection device body | |
| CN209070017U (en) | A kind of Intelligent insulating resistance meter | |
| CN205880184U (en) | Calibration equipment is synthesized to portable arrester discharge counter | |
| CN216285684U (en) | Calibration device for electrical parameter measuring instrument | |
| CN209590184U (en) | A kind of leakage current tester | |
| CN210465546U (en) | Intelligent loop resistance tester | |
| CN212779927U (en) | Portable intelligent valve performance adopts accuse device | |
| CN209184230U (en) | A kind of extra-high voltage near region electric network reactive-load tranformer protection test device | |
| CN210894565U (en) | Direct current bus distributed capacitance on-line measurement | |
| CN219085127U (en) | Portable multifunctional display device for measuring excitation characteristics of voltage transformer | |
| CN108931671A (en) | A kind of electronic product production finished product test device and its test method | |
| CN218788060U (en) | Intelligent current detection recorder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |