CN102866301B - A kind of earth resistance analytical equipment and the analysis method of earth resistance - Google Patents
A kind of earth resistance analytical equipment and the analysis method of earth resistance Download PDFInfo
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Abstract
The invention discloses a kind of analysis method of earth resistance analytical equipment and earth resistance, the insulating resistance measuring module, the earth resistance that including processor and are connected with described processor analyze module, Temperature and Humidity module and display module, the present invention not only achieves the detection to surrounding, also achieve the intelligent analysis to earth resistance, substantially increase the safety of earth resistance analytical equipment.And this earth resistance analytical equipment has higher lightning protection effect.
Description
Technical field
The present invention relates to resistance testing device field, especially relate to a kind of surrounding enviroment monitoring to earth resistance, earth resistance, the comprehensive analysis device of earth resistance analysis and analysis method.
Background technology
The grounding resistance of various equipment and structures is electric power, ferrum road, petrochemical industry, one important technology index of the industry lightning protection demands such as communication, grounding resistance is also had and clearly requires very much by every profession and trade, the lightning protection effect of equipment and structures is affected the biggest by grounding resistance, so it is the most a lot of to the Testing Technology Study of earth resistance, the method of testing of earth resistance, test equipment is the most various, if any megger formula earth resistance tester, digital earth resistance tester, jaw type earth resistance etc., also there is online and non-online earth resistance tester etc..
But, it is only the test to grounding resistance that earth resistance is tested by current earth resistance tester, and fixing point earth resistance is affected by soil resistivity in actual applications, and soil resistivity is affected by soil moisture, temperature etc. again.It is known that the humidity of soil increases when raining, earth resistance can diminish, and long high temperature is without rainy day gas, and the humidity of soil reduces, temperature raises earth resistance and can substantially become big.Further, few to the intellectual analysis of earth resistance resistance in existing method of testing.The earth resistance lightning protection effect that causes of change is analyzed inconvenience, grounding resistance change that every profession and trade is caused according to surrounding environment change and take counter-measure and to reduce the effect of damage to crops caused by thunder loss little.
It addition, existing earth resistance device self is not enough to the protection of thunder and lightning, during as online earth resistance, it is subject to thunder and lightning and damages.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that a kind of earth resistance analytical equipment with environment monitoring function and the analysis method of earth resistance.
It is as follows that the present invention solves the technical scheme that technical problem used:
A kind of earth resistance analytical equipment with environment monitoring function, wherein, the insulating resistance measuring module, the earth resistance that including processor and are connected with described processor analyze module, Temperature and Humidity module and display module,
Wherein, described insulating resistance measuring module is for receiving the control instruction of processor, the voltage signal of detection earth resistance and current signal, and the voltage signal detected and current signal are filtered and processing and amplifying, and the resistance value of calculating earth resistance, and it is analyzed processing by described resistance value transmission to processor；
The humiture of earth resistance surrounding soil is detected by described Temperature and Humidity module in real time, and sends the temperature value detected and humidity value to processor analyzing and processing；
Described processor is analyzed processing for the temperature value to the resistance value of the earth resistance that earth resistance detection module sends and analyzing the earth resistance surrounding soil that described Temperature and Humidity module sends and humidity value, draw change in resistance curve, temperature variation curve and moisture curve, and the transmission of change in resistance curve, temperature variation curve and moisture curve is shown to display module；
Display module is for showing change in resistance curve, temperature variation curve and the moisture curve that described processor sends.
Earth resistance is analyzed module and is transferred change in resistance curve, temperature variation curve and moisture curve from described processor, and according to the variation relation of change in resistance curve, temperature variation curve and moisture curve, is given and processes strategy accordingly.
The described earth resistance analytical equipment with environment monitoring function, wherein, described insulating resistance measuring module also includes:
Earth resistance signal acquisition module, for gathering voltage signal and the current signal of earth resistance, and is sent to earth resistance signal filtering module by described voltage signal and current signal；
Earth resistance filtration module, for being filtered processing to the voltage signal of the earth resistance that described earth resistance signal acquisition module sends and current signal, filters out the clutter in described voltage signal and current signal；
Earth resistance amplification module, for carrying out A/D conversion and processing and amplifying to the described voltage signal after earth resistance filtration module Filtering Processing and current signal.
The described earth resistance analytical equipment with environment monitoring function, wherein, described processor is additionally operable to the resistance value to described earth resistance, the temperature value of described earth resistance surrounding soil and humidity value and carries out drift correction.
The described earth resistance analytical equipment with environment monitoring function, wherein, described earth resistance analytical equipment also includes communication module, for communicating with monitoring system, sends exceptional instructions to described monitoring system, provides prompting message.
The described earth resistance analytical equipment with environment monitoring function, wherein, described earth resistance analytical equipment also includes alarm module, for when the resistance value of earth resistance exceedes preset resistive value scope, sends alarm signal.
The described earth resistance analytical equipment with environment monitoring function, wherein, described earth resistance analytical equipment also includes thunder and lightning isolation module, for when thunder and lightning occurs, cuts off thunder and lightning and enters described earth resistance analytical equipment from power supply and described insulating resistance measuring module.
A kind of method by the above-mentioned earth resistance analytical equipment analysis grounding resistance value with environment monitoring function, comprises the following steps:
A, insulating resistance measuring module receive the instruction of processor, start to detect the voltage signal of earth resistance and current signal, the voltage signal detected and current signal are filtered and processing and amplifying, calculate the resistance value of earth resistance, and the most described resistance value sends and is analyzed processing to processor；
The humiture of earth resistance surrounding soil is detected by B, described Temperature and Humidity module, and sends the temperature value detected and humidity value to processor analyzing and processing；
The resistance value of C, processor analyzing and processing earth resistance, draws the change in resistance curve of earth resistance；And the temperature value of analysis grounding resistance surrounding soil and humidity value, draw temperature variation curve and moisture curve；
D, shown by display module described earth resistance analyze module send change in resistance curve, temperature variation curve and moisture curve；
E, earth resistance are analyzed module and are transferred change in resistance curve, temperature variation curve and moisture curve from processor, and according to the variation relation of change in resistance curve, temperature variation curve and moisture curve, are given and process strategy accordingly.
The method of described analysis grounding resistance value, wherein, described step C also includes: described processor carries out drift correction to resistance value, the temperature value of described earth resistance surrounding soil and the humidity value of described earth resistance.
The method of described analysis grounding resistance value, wherein, also includes after described step E: described change in resistance curve, temperature variation curve and moisture curve are derived by communication module.
The earth resistance analytical equipment with environment monitoring function provided by the present invention and the analysis method of earth resistance, not only achieve the detection to surrounding, also achieve the intelligent analysis to earth resistance, substantially increase the safety of earth resistance analytical equipment.And this earth resistance analytical equipment has higher lightning protection effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the earth resistance analytical equipment with environment monitoring function that the present invention provides.
Fig. 2 is the structural representation of a preferred embodiment of the earth resistance analytical equipment with environment monitoring function that the present invention provides.
Fig. 3 is the structural representation of the another preferred embodiment of the earth resistance analytical equipment with environment monitoring function that the present invention provides.
Fig. 4 is the analysis method flow diagram carrying out earth resistance by having the earth resistance analytical equipment of environment monitoring function that the present invention provides.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
See Fig. 1, Fig. 1 is the structural representation of the earth resistance analytical equipment with environment monitoring function that the present invention provides, and described earth resistance analytical equipment includes: processor 10 and the insulating resistance measuring module 20 being connected with described processor 10, earth resistance analysis module 50, Temperature and Humidity module 30 and display module 40.
Specifically, or described processor 10 is preferably single-chip microcomputer DSP, it is mainly used in date, time, the Initialize installation of earth resistance drift correction value, and control described insulating resistance measuring module 20, earth resistance analysis module 50, Temperature and Humidity module 30 and display module 40, and the data sending earth resistance detection module 20, Temperature and Humidity module 30 are analyzed processing.
Described insulating resistance measuring module 20 is for receiving the control instruction of processor 10, the voltage signal of detection earth resistance and current signal, and the voltage signal detected and current signal are filtered and processing and amplifying, and the resistance value of calculating earth resistance, and it is analyzed processing by described resistance value transmission to processor 10.
Further, as shown in Figure 2, insulating resistance measuring module 20 also includes earth resistance signal acquisition module 21, earth resistance filtration module 22 and earth resistance amplification module 23, wherein, insulating resistance measuring module 21 is by receiving the control instruction that processor 10 sends, and this control instruction is earth resistance pumping signal.Earth resistance pumping signal includes voltage excitation signals and current excitation signal, after receiving earth resistance pumping signal, earth resistance module 20 starts, gather voltage signal and the current signal of earth resistance, voltage signal and the current signal of the earth resistance of collection are sent to earth resistance filtration module 22, it is filtered processing by earth resistance filtration module 22, effectively filters out interference noise therein.Through earth resistance amplification module 23, voltage signal and current signal are carried out A/D conversion and processing and amplifying the most again.
The humiture of earth resistance surrounding soil is detected by described Temperature and Humidity module 30 in real time, the temperature-humidity signal detected is carried out A/D conversion and processing and amplifying simultaneously, obtain concrete temperature value and humidity value, and the temperature value detected and humidity value transmission are analyzed and processed to processor 10.
Processor 10 is when the data sending earth resistance detection module 20, Temperature and Humidity module 30 are analyzed processing, the resistance value of the earth resistance that can send respectively according to them, draw the change in resistance curve of earth resistance, and the temperature value of earth resistance surrounding soil that sends of described Temperature and Humidity module 30 and humidity value, draw temperature variation curve and moisture curve.In order to improve the accuracy of resistance value, temperature value and humidity value, processor also can carry out drift correction to these data, in order to reduces detection error, improves the accuracy analyzed.
Earth resistance is analyzed module 50 and is transferred change in resistance curve, temperature variation curve and moisture curve from described processor 10, and according to the variation relation of change in resistance curve, temperature variation curve and moisture curve, be given and process strategy accordingly, improve the intellectuality that earth resistance is analyzed.Process strategy also can be sent to display module and show by the module 50 of earth resistance analysis simultaneously, makes display more directly perceived.
Display module 40 is for showing change in resistance curve, temperature variation curve and the moisture curve that described processor 10 sends, it is also possible to display earth resistance analyzes the process strategy that module draws.
As shown in Figure 3, the earth resistance analytical equipment that the present invention provides also includes power module 60, data memory module 80, communication module 90, alarm module 110, key-press module 70 and thunder and lightning isolation module 100, wherein, power module 60 predominantly earth resistance analytical equipment provides supply of electric power；The resistance value of the earth resistance that data memory module 80 collects for storage, the warm and humid angle value of surrounding soil, and the resistance value according to the earth resistance collected, change in resistance curve, temperature variation curve and the moisture curve etc. that the warm and humid angle value of surrounding soil is drawn；Communication module 90 is for communicating with monitoring system, and communication mode is wired or wireless, it is simple to derive the data record of storage from data memory module, in order to analyze judgement further；Alarm module 110 is for when the resistance value of earth resistance is beyond preset resistive value scope set in advance, exceptional instructions is sent to monitoring system by communication module 90, provide alarm signal, to remind locally or remotely staff to process in time, damage equipment when preventing thunder and lightning, cause damage.Key-press module 70 is mainly used in the button operation by receiving user, starts earth resistance and analyzes module 50, enters the analysis program of earth resistance.Thunder and lightning isolation module 100 is additionally operable to when thunder and lightning occurs, and blocks thunder and lightning and enters earth resistance analytical equipment from passages such as power supply, test pole, interpole, insulating resistance measuring modules, prevent thunder and lightning from causing damage device, improves the lightning protection ability of device.
Based on the above-mentioned earth resistance analytical equipment with environment monitoring function, present invention also offers a kind of analysis method of earth resistance, as shown in Figure 4, comprise the following steps:
Step S100, insulating resistance measuring module receive the instruction of processor, start to detect the voltage signal of earth resistance and current signal, the voltage signal detected and current signal are filtered and processing and amplifying, calculate the resistance value of earth resistance, and the most described resistance value sends and is analyzed processing to processor；
The humiture of earth resistance surrounding soil is detected by step S200, described Temperature and Humidity module, and sends the temperature value detected and humidity value to processor analyzing and processing；
The resistance value of step S300, processor analyzing and processing earth resistance, draws the change in resistance curve of earth resistance；And the temperature value of analysis grounding resistance surrounding soil and humidity value, draw temperature variation curve and moisture curve；
Step S400, shown by display module described earth resistance analyze module send change in resistance curve, temperature variation curve and moisture curve；
Step S500, earth resistance are analyzed module and are transferred change in resistance curve, temperature variation curve and moisture curve from processor, and according to the variation relation of change in resistance curve, temperature variation curve and moisture curve, be given and process strategy accordingly.
Wherein, when using for the first time, processor is to date, time, the Initialize installation of earth resistance drift correction value, and sets test period and testing time.The analysis program to earth resistance is then opened between when tested, processor sends earth resistance pumping signal, earth resistance acquisition module starts, gather voltage signal and the current signal of earth resistance, and grounded resistance filtration module effectively filters out interference noise, earth resistance amplification module carries out A/D conversion and the signal amplification of signal, simultaneously, Temperature and Humidity module works, gather the humiture of earth resistance surrounding soil, and carry out signal A/D conversion and amplification, these signals enter processor and again carry out signal processing, such as: to grounding resistance, temperature value and humidity value carry out drift correction etc..
In step S300, after data have been processed by processor, data memory module can be started, detection date, time, grounding resistance, temperature value, humidity value and their curve chart are stored in data memory module, facilitates subsequent query and analysis.
And when grounding resistance exception, processor can start alarm module, carry out sound and light alarm, local staff is reminded to dispose in time, prevent thunder and lightning from when occurring, equipment is caused damage, monitoring system can certainly be connected by communication module, by sending exceptional instructions to monitoring system, notify that staff processes in time.
When needs are analyzed from data memory module called data, by the communication interface of communication module, the data in data memory module can be exported to External memory equipment.Data in data memory module can also be inquired about by staff, input inquiry condition, and such as date, time, grounding resistance scope etc., earth resistance analytical equipment can according to condition carry out inquiring about and showing Query Result in display module.The interactivity of lifting device.
Preferably, when earth resistance analytical equipment is not operated for a long time, device can be automatically into park mode, to reduce electric quantity consumption.Certainly dormancy is stopped when the testing time arrives or has operated by personnel.
In sum, the earth resistance analytical equipment with environment monitoring function of present invention offer and the analysis method of earth resistance, by to the resistance value of earth resistance and ambient temperature value and the collection of humidity value, and draw and analyze resistance analysis curve, temperature analysis curve and psychrometrc analysis curve, effectively reflect the variation relation of resistance and humiture, and can be given according to this variation relation and process strategy accordingly, not only achieve the detection to surrounding, also achieve the intelligent analysis to earth resistance, substantially increase the safety of device.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (5)
1. an earth resistance analytical equipment with environment monitoring function, it is characterised in that include processor and the insulating resistance measuring module being connected with described processor, earth resistance analysis module, Temperature and Humidity module and display module,
Wherein, described insulating resistance measuring module is for receiving the control instruction of processor, the voltage signal of detection earth resistance and current signal, and the voltage signal detected and current signal are filtered and processing and amplifying, and the resistance value of calculating earth resistance, and it is analyzed processing by described resistance value transmission to processor；
The humiture of earth resistance surrounding soil is detected by described Temperature and Humidity module in real time, and sends the temperature value detected and humidity value to processor analyzing and processing；
Described processor is single-chip microcomputer or DSP, for to the date, time and the Initialize installation of earth resistance drift correction value, and for being analyzed processing to the temperature value of the earth resistance surrounding soil that the resistance value of the earth resistance that earth resistance detection module sends and described Temperature and Humidity module send and humidity value, draw change in resistance curve, temperature variation curve and moisture curve, and by change in resistance curve, temperature variation curve and moisture curve transmission show to display module, described processor is additionally operable to the resistance value to described earth resistance, temperature value and the humidity value of described earth resistance surrounding soil carry out drift correction；
Display module is for showing change in resistance curve, temperature variation curve and the moisture curve that described processor sends；
Earth resistance is analyzed module and is transferred change in resistance curve, temperature variation curve and moisture curve from described processor, and according to the variation relation of change in resistance curve, temperature variation curve and moisture curve, is given and processes strategy accordingly；
Described earth resistance analytical equipment also includes alarm module, for when the resistance value of earth resistance exceedes preset resistive value scope, sends alarm signal；
Described earth resistance analytical equipment also includes thunder and lightning isolation module, for when thunder and lightning occurs, cut off thunder and lightning and enter described earth resistance analytical equipment from power supply, when the resistance value exception of earth resistance, processor starts alarm module, carry out sound and light alarm, local staff is reminded to dispose in time, prevent thunder and lightning from when occurring, equipment is caused damage, processor connects monitoring system by communication module, by sending exceptional instructions to monitoring system, notify that staff processes in time, when earth resistance analytical equipment is not operated for a long time, device can be automatically into park mode, to reduce electric quantity consumption, dormancy is stopped when the testing time arrives or has operated by personnel.
The earth resistance analytical equipment with environment monitoring function the most according to claim 1, it is characterised in that described insulating resistance measuring module also includes:
Earth resistance signal acquisition module, for gathering voltage signal and the current signal of earth resistance, and is sent to earth resistance filtration module by described voltage signal and current signal；
Earth resistance filtration module, for being filtered processing to the voltage signal of the earth resistance that described earth resistance signal acquisition module sends and current signal, filters out the clutter in described voltage signal and current signal；
Earth resistance amplification module, for carrying out A/D conversion and processing and amplifying to the described voltage signal after earth resistance filtration module Filtering Processing and current signal.
3. according to the earth resistance analytical equipment with environment monitoring function described in claim 1, it is characterized in that, described earth resistance analytical equipment also includes communication module, for communicating with monitoring system, send exceptional instructions to described monitoring system, provide prompting message.
4., by a method for the earth resistance analytical equipment analysis grounding resistance value with environment monitoring function as described in any one of claim 1 to 3, comprise the following steps:
A, insulating resistance measuring module receive the instruction of processor, start to detect the voltage signal of earth resistance and current signal, the voltage signal detected and current signal are filtered and processing and amplifying, calculate the resistance value of earth resistance, and be analyzed processing by described resistance value transmission to processor；
The humiture of earth resistance surrounding soil is detected by B, described Temperature and Humidity module, and sends the temperature value detected and humidity value to processor analyzing and processing；
The resistance value of C, processor analyzing and processing earth resistance, draws the change in resistance curve of earth resistance；And the temperature value of analysis grounding resistance surrounding soil and humidity value, draw temperature variation curve and moisture curve；
D, shown change in resistance curve, temperature variation curve and moisture curve that described processor sends by display module；
E, earth resistance are analyzed module and are transferred change in resistance curve, temperature variation curve and moisture curve from processor, and according to the variation relation of change in resistance curve, temperature variation curve and moisture curve, are given and process strategy accordingly；
Described step C also includes: described processor carries out drift correction to resistance value, the temperature value of described earth resistance surrounding soil and the humidity value of described earth resistance；
Described processor is single-chip microcomputer or DSP, for date, time and the Initialize installation of earth resistance drift correction value.
The method of analysis grounding resistance value the most according to claim 4, it is characterised in that also include after described step E: described change in resistance curve, temperature variation curve and moisture curve are derived by communication module.
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