CN109188098A - A kind of ground resistance on-line monitoring management system - Google Patents
A kind of ground resistance on-line monitoring management system Download PDFInfo
- Publication number
- CN109188098A CN109188098A CN201811080933.0A CN201811080933A CN109188098A CN 109188098 A CN109188098 A CN 109188098A CN 201811080933 A CN201811080933 A CN 201811080933A CN 109188098 A CN109188098 A CN 109188098A
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- China
- Prior art keywords
- module
- mcu
- gprs
- ground resistance
- data
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
Abstract
The invention discloses a kind of ground resistances to monitor management system, including MCU nucleus module, signal acquisition process unit, GPRS-DTU wireless transport module, key, alarm unit, data export interface, LCD display module on-line；The collection terminal of signal acquisition process unit is connected with ground resistance meter；Key is connected with the control port of MCU nucleus module；The output control terminal of MCU nucleus module is connected with alarm unit, data export interface, LCD display module, GPRS-DTU module respectively；Alarm unit carries out audible alarm when ground resistance is more than set threshold value；The ground resistance data stored in MCU nucleus module export is used as historical record and stored by data export interface；The LCD display module is for showing menu, resistance measurement data；GPRS-the DTU module is interactively communicated with client terminal progress long distance wireless by communication base station and is connect；MCU nucleus module is separately connected with power module, and power module is system power supply.The present invention can real-time, accurate measurement of Grounding Resistance value the advantages that.
Description
Technical field
The present invention relates to intelligent monitor system field, especially a kind of computer rooms such as petroleum and petrochemical industry, electric power, communication that are suitable for are connect
The on-line monitoring managing device of ground resistance.
Background technique
It is well known that whether the grounding resistance of electrical equipment and electrical connection are qualified, it is particularly significant to electrical safety.Very much
The power utilization environments such as mobile communication base station, computer room, electric power unattended operation transformer station are complicated, and electricity consumption access way is numerous, network voltage
Fluctuate it is larger, grounding resistance be easy to higher, traditional ground resistance test needs manually reconnoitre one by one, once ground connection hinder
It is worth higher and can not checks out in time, when is struck by lightning to the huge damage of equipment bring.In order to make protected object
Grounding-for-lightning device there is reliable protecting effect, not only to have reasonable design and correctly construction, it is also noted that often
Maintenance test, if cannot not only play protective action, or even can also protected object be made to be in because earthing or grounding means is unqualified
In the case where more dangerous.But some protected objects are located in remoter the distance between place or protected object
Distant, so that the cost of manual inspection sharply increases, and the state of earthing or grounding means cannot be fed back in real time.
Summary of the invention
It is an object of that present invention to provide it is a kind of can in real time, timing, accurate measurement of Grounding Resistance value ground resistance exist
Line management system for monitoring.
To achieve the above object, use following technical scheme: system of the present invention includes MCU nucleus module, signal
Acquisition process unit, GPRS-DTU wireless transport module, key, alarm unit, data export interface, LCD display module；Institute
It states MCU nucleus module and is responsible for data storage processing and program operation；The collection terminal and ground resistance meter of the signal acquisition process unit
It is connected, the information output of signal acquisition process unit is connected with MCU nucleus module, and signal acquisition process unit is acquired and handled
The voltage and current information of ground resistance meter is simultaneously sent in MCU nucleus module and carries out operation；The control of the key and MCU nucleus module
Port is connected, and by key control menu option, carries out the operations such as local measurement, the inquiry of historical data, threshold value setting；The MCU core
The output control terminal of core module is connected with alarm unit, data export interface, LCD display module, GPRS-DTU module respectively；
The alarm unit carries out audible alarm when ground resistance is more than set threshold value, and carries out corresponding alarm on client terminal and mention
Show；The ground resistance data stored in MCU nucleus module export is used as historical record and stored by the data export interface；It is described
LCD display module is for showing menu, resistance measurement data；GPRS-the DTU module passes through communication base station and client terminal
It carries out long distance wireless and interactively communicates connection；MCU nucleus module is separately connected with power module, and power module is system power supply.
Further, the signal acquisition process unit includes voltage acquisition end and current acquisition end；Voltage acquisition end packet
Include voltage analog signal processing module and voltage acquisition module；Current acquisition end includes current analog signal processing module and electric current
Acquisition module；Analog voltage signal is acquired and handles well to be sent in MCU nucleus module by voltage acquisition end carries out operation；Electric current
Analog current signal is acquired and handles well to be sent in MCU nucleus module by collection terminal carries out operation.
Further, the GPRS-DTU module supports two kinds of serial ports of RS232/RS485, realizes serial data and GPRS
Network bi-directional transparent transmission is sent data to by GPRS network on specified server, and client terminal carries out reading data；?
Client terminal sends long-range measuring signal to server, is sent to MCU nucleus module by GPRS-DTU module and is remotely surveyed
Amount operation.
Further, the MCU nucleus module selects STC15W4K32S4 single-chip microcontroller.
Further, the power module is variable-frequency power sources, and the suitable voltage of variable-frequency power sources adjust automatically makes to test electric current
Reach setting value；Measuring circuit is automatically selected according to test current and switching range, filters interference using Fourier transform, separates
Signal fundamental wave out, MCU nucleus module carry out vector calculating to test electric current and test voltage, and MCU nucleus module real part calculates electricity
Resistance value, MCU nucleus module imaginary part calculating reactance value.
Further, the MCU nucleus module is connected to after GPRS-DTU module the service that transmits data to by serial ports
Device, client terminal check ground resistance measurement data by being connected to the network to server address.
Compared with prior art, the present invention has the advantage that
1, cost of labor is substantially reduced, it, can be primary for the insulating resistance measuring in the area such as unattended mountain area base station, steel tower
Property construction exempt subsequent artefacts' testing cost.
2, ground resistance timing is detected, ensures the good operation of earthing or grounding means, once generation ground resistance is exceeded, and first
Time alarms, and ensures equipment and personal safety under thunder and lightning environment.
3, using GPRS transmission mode, field wiring difficult problem is solved, and information transmission is stablized, signal is powerful.
4, grounding resistance can be monitored in real time, allow equipment to be in the ground connection environment of safety, guarantee the normal operation of equipment.
Detailed description of the invention
Fig. 1 is system block diagram of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
In system block diagram of the invention as shown in Figure 1, system of the present invention includes MCU nucleus module, signal acquisition process
Unit, GPRS-DTU wireless transport module, key, alarm unit, data export interface, LCD display module；The MCU core
Module is STC15W4K32S4 single-chip microcontroller, is responsible for data storage processing and program operation；The signal acquisition process unit is adopted
Collection end is connected with ground resistance meter, and the information output of signal acquisition process unit is connected with MCU nucleus module；At the signal acquisition
Managing unit includes voltage acquisition end and current acquisition end；Voltage acquisition end includes voltage analog signal processing module and voltage acquisition
Module；Current acquisition end includes current analog signal processing module and current acquisition module；Voltage acquisition end is believed by analog voltage
It number acquires and handles well to be sent in MCU nucleus module and carry out operation；Analog current signal is acquired and is handled by current acquisition end
It is sent to well in MCU nucleus module and carries out operation.Signal acquisition process unit acquires and handles the voltage and current information of ground resistance meter
And it is sent in MCU nucleus module and carries out operation；The key is connected with the control port of MCU nucleus module, by key control dish
Radio button carries out the operations such as local measurement, the inquiry of historical data, threshold value setting；The output control terminal of the MCU nucleus module point
It is not connected with alarm unit, data export interface, LCD display module, GPRS-DTU module；The alarm unit is in ground connection electricity
Resistance carries out audible alarm when being more than set threshold value, and corresponding warning note is carried out on client terminal；The data export interface
The ground resistance data stored in MCU nucleus module export is used as historical record to store；The LCD display module is for showing
Menu, resistance measurement data；GPRS-the DTU module carries out long distance wireless with client terminal by communication base station and interactively communicates
Connection, GPRS-DTU module support two kinds of serial ports of RS232/RS485, realize serial data and the two-way transparent transmission of GPRS network,
It is sent data to by GPRS network on specified server, client terminal carries out reading data；It is sent in client terminal long-range
Measuring signal is sent to MCU nucleus module by GPRS-DTU module and carries out long-range measurement operation to server.MCU core mould
Block is connected to after GPRS-DTU module by serial ports and transmits data to server, and client terminal passes through network connection to service
Ground resistance measurement data is checked in device address.MCU nucleus module is separately connected with power module, and power module is variable-frequency power sources, becomes
The suitable voltage of frequency power adjust automatically makes test electric current reach setting value；Measuring circuit is automatically selected and is cut according to test current
Range is changed, interference is filtered using Fourier transform, isolates signal fundamental wave, MCU nucleus module is to test electric current and test voltage
Vector calculating is carried out, MCU nucleus module real part calculates resistance value, MCU nucleus module imaginary part calculating reactance value.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (6)
1. a kind of ground resistance monitors management system on-line, it is characterised in that: the system comprises MCU nucleus module, signals to adopt
Collect processing unit, GPRS-DTU wireless transport module, key, alarm unit, data export interface, LCD display module；It is described
MCU nucleus module is responsible for data storage processing and program operation；The collection terminal of the signal acquisition process unit and ground resistance meter phase
Even, the information output of signal acquisition process unit is connected with MCU nucleus module, and signal acquisition process unit acquires and handles ground
It hinders the voltage and current information of instrument and is sent in MCU nucleus module and carry out operation；The control terminal of the key and MCU nucleus module
Mouth is connected, and by key control menu option, carries out specified operation；The output control terminal of the MCU nucleus module is single with alarm respectively
Member, data export interface, LCD display module, GPRS-DTU module are connected；The alarm unit is more than set in ground resistance
Audible alarm is carried out when threshold value, and corresponding warning note is carried out on client terminal；The data export interface is by MCU core mould
The ground resistance data export stored in block is used as historical record and stores；The LCD display module is for showing that menu, resistance are surveyed
Measure data；GPRS-the DTU module is interactively communicated with client terminal progress long distance wireless by communication base station and is connect；MCU core
Core module is separately connected with power module, and power module is system power supply.
2. a kind of ground resistance according to claim 1 monitors management system on-line, it is characterised in that: the signal acquisition
Processing unit includes voltage acquisition end and current acquisition end；Voltage acquisition end includes that voltage analog signal processing module and voltage are adopted
Collect module；Current acquisition end includes current analog signal processing module and current acquisition module；Voltage acquisition end is by analog voltage
Signal acquisition is simultaneously handled well to be sent in MCU nucleus module and carries out operation；Analog current signal is acquired and is located by current acquisition end
It manages to be sent in MCU nucleus module and carries out operation.
3. a kind of ground resistance according to claim 1 monitors management system on-line, it is characterised in that: the GPRS-
DTU module supports two kinds of serial ports of RS232/RS485, realizes serial data and the two-way transparent transmission of GPRS network, passes through GPRS net
Network is sent data on specified server, and client terminal carries out reading data；Client terminal send long-range measuring signal to
Server is sent to MCU nucleus module by GPRS-DTU module and carries out long-range measurement operation.
4. a kind of ground resistance according to claim 1 monitors management system on-line, it is characterised in that: the MCU core
Module selects STC15W4K32S4 single-chip microcontroller.
5. a kind of ground resistance according to claim 1 monitors management system on-line, it is characterised in that: the power module
For variable-frequency power sources, the suitable voltage of variable-frequency power sources adjust automatically makes test electric current reach setting value；Measuring circuit is according to test electricity
Stream automatically selects and switching range, filters interference using Fourier transform, isolates signal fundamental wave, MCU nucleus module is to test
Electric current and test voltage carry out vector calculating, and MCU nucleus module real part calculates resistance value, MCU nucleus module imaginary part calculating reactance
Value.
6. a kind of ground resistance according to claim 1 monitors management system on-line, it is characterised in that: the MCU core
Module is connected to after GPRS-DTU module by serial ports and transmits data to server, and client terminal passes through network connection to clothes
Ground resistance measurement data is checked in business device address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080933.0A CN109188098A (en) | 2018-09-17 | 2018-09-17 | A kind of ground resistance on-line monitoring management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080933.0A CN109188098A (en) | 2018-09-17 | 2018-09-17 | A kind of ground resistance on-line monitoring management system |
Publications (1)
| Publication Number | Publication Date |
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| CN109188098A true CN109188098A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811080933.0A Pending CN109188098A (en) | 2018-09-17 | 2018-09-17 | A kind of ground resistance on-line monitoring management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113534706A (en) * | 2021-07-12 | 2021-10-22 | 河南九域博慧方舟咨询发展有限公司 | Intelligent detection and analysis system for grounding resistance of transformer substation |
| CN114978318A (en) * | 2022-04-27 | 2022-08-30 | 四川红华实业有限公司 | Online electronic seal system |
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| CN2514353Y (en) * | 2001-09-28 | 2002-10-02 | 国家电力公司华中公司技术中心 | Measurer for grounding resistance of grounded counterpoise |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113534706A (en) * | 2021-07-12 | 2021-10-22 | 河南九域博慧方舟咨询发展有限公司 | Intelligent detection and analysis system for grounding resistance of transformer substation |
| CN114978318A (en) * | 2022-04-27 | 2022-08-30 | 四川红华实业有限公司 | Online electronic seal system |
| CN114978318B (en) * | 2022-04-27 | 2023-10-20 | 四川红华实业有限公司 | Online electronic seal system |
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Application publication date: 20190111 |