CN205656241U - Ground resistance on -line monitoring alarm and remote monitering system - Google Patents

Ground resistance on -line monitoring alarm and remote monitering system Download PDF

Info

Publication number
CN205656241U
CN205656241U CN201620097469.6U CN201620097469U CN205656241U CN 205656241 U CN205656241 U CN 205656241U CN 201620097469 U CN201620097469 U CN 201620097469U CN 205656241 U CN205656241 U CN 205656241U
Authority
CN
China
Prior art keywords
module
earth resistance
concentrator
chip processing
processing module
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
Application number
CN201620097469.6U
Other languages
Chinese (zh)
Inventor
赵峰
平帅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an Jsbound Technology Corp
NANJING SHANGZHI ELECTRONIC TECHNOLOGY Co Ltd
Original Assignee
Xi'an Jsbound Technology Corp
NANJING SHANGZHI ELECTRONIC TECHNOLOGY Co Ltd
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 Xi'an Jsbound Technology Corp, NANJING SHANGZHI ELECTRONIC TECHNOLOGY Co Ltd filed Critical Xi'an Jsbound Technology Corp
Priority to CN201620097469.6U priority Critical patent/CN205656241U/en
Application granted granted Critical
Publication of CN205656241U publication Critical patent/CN205656241U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a ground resistance on -line monitoring alarm and remote monitering system, wherein, exciting coil and first full difference operational amplifier module are connected, first full difference operational amplifier module is connected with single chip processing module, induction coil and the full difference operational amplifier module of second are connected, the second full difference operational amplifier module be connected with single chip processing module, display module, the leading -in module of procedure and data derivation module all are connected with single chip processing module, the power module power supply, the supplementary stake (3) that detects need not to squeeze into, thereby the manpower that consumes when having avoided the construction, and material resources, financial resources, use cost has significantly reduced, equipment originally needs the manual work to go to the scene to measure, this device both can be a single neuron, realize single function, also can combine together network technique and communication technology realizes the networking, can also preserve measuring result, make things convenient for the data acquisition and the maintenance in later stage, the integral control to equipment has been improved.

Description

Earth resistance online monitoring alarm instrument and long distance control system
Technical field
This utility model relates to earth resistance monitoring technical field, particularly relate to earth resistance online monitoring alarm instrument with And based on the long distance control system on this device.
Background technology
Developing rapidly due to computer technology in recent years, earth resistance tester has also permeated substantial amounts of microprocessor skill Art, it measures function, and content and precision are that general instrument institute is incomparable.Earth resistance tester is inspection, measures ground connection The Common Instrument of resistance, is also electrical safety inspection and the indispensable instrument of earth work final acceptance of construction, is widely used in electricity The electrical equipment grounding in the fields such as power, railway, traffic, army, telecommunications, finance, chemical industry, meteorology is measured and the ground connection of transmission line Measure etc..
The development initial people of mileage of earth resistance tester are to use voltammetry to the measurement of earth resistance, and this test is The most original.It is presented herein below by ammeter, the measuring method of voltammeter.The size of electric current, choosing must be first estimated when measuring resistance Go out the insulated conductor in suitable cross section, may utilize variable resistance R when pilot study and adjust electric current, when formally measuring, then may be used Become resistive short, the numerical value of ammeter and voltammeter gained can calculate earth resistance.Voltammetry measures ground resistance to be had significantly Weak point, first: loaded down with trivial details, workload is big.During test, extremely 20~50 meters of earth rod distance ground, and auxiliary earth distance connects Place 40~100 meters.Additionally affected greatly by external interference, sometimes cannot be measured in strong voltage region.
Five the sixties Soviet Union E type megger measurement instead of voltammetry measure.Due to easy to carry, it it is again hand power Machine, workload is less than voltammetry.
The domestic earth resistance tester of the seventies comes out, no matter the scope of measurement, scale division value, accuracy or structure, Volume, weight, will be better than " E " type megger.Therefore, in the quite a while ground meter all with hand table for typical case instrument Device.Equipment self grounding body in use, should be disconnected by hand-rail type table with equipment, accurate with avoid grounding body impact to measure Property.
Above-mentioned instrument due to the relation of hand generator, the throwing of precision the most very poor the eighties digital grounding resistance tester Enter to use and bring life to earth resistance, although the mode of connection of test does not has difference with hand table, but it is steady Qualitative much higher more than megger pointer-type.Occur in that the most again a kind of digital earth resistance tester, adopt during test With two collimation method on-line measurements, it is not necessary to play auxiliary earth stake, the zero line of water pipe, caliduct or AC outlet is connect as auxiliary Ground, can the index such as measurement of Grounding Resistance, soil resistivity, alternating voltage, and have automatic compensation function, not only increase measurement essence Degree, also has the function such as anti-misoperation, intelligent prompt.
Utility model content
The technical problems to be solved in the utility model is: provide earth resistance online monitoring alarm instrument, it is not necessary to squeeze into auxiliary Detect stake (3) and detect, thus the spent manpower when of avoiding construction, material resources, financial resources, greatly reduce Use cost, equipment originally needs manually to go to scene to measure, and this equipment both can be single neuron now, it is achieved single One function, it is also possible to combine realization networking by network technology and communication technology, it is also possible to measurement result is preserved, convenient The data acquisition in later stage and maintenance, improve the overall control to equipment.
To achieve these goals, the concrete technical scheme that this utility model provides is: earth resistance online monitoring alarm Instrument, it is characterised in that including:
Excitation coil, is used for producing alternating magnetic field so that producing electric current in earth lead;
First Differential OPAMP module, for amplification also output high-power driving source to drive excitation coil;
Induction coil, electric current in inductive grounding line also produces faradic current;
Second Differential OPAMP module, for being converted into induced voltage signal processing and amplifying by sensor current signal;
Single chip processing module, for producing a lower powered driving source and being transferred to the first Differential OPAMP module, It addition, receive the induced voltage signal of the second Differential OPAMP module transfer, carry out modulus process, read inductive voltage value, and According to the linear relationship of induced voltage Yu earth resistance, by inductive voltage value computing the actual earth resistance of inferring correspondence Value;
Display module, is used for showing actual grounding resistance;
Program imports module, runs program for importing single chip processing module and is implanted in the sense in this operation program Answer the linear relationship of voltage and earth resistance;
Data derive module, are used for deriving actual grounding resistance;
Power module, is used for providing different voltage;
Described excitation coil and the first Differential OPAMP module connect, at described first Differential OPAMP module and single-chip microcomputer Reason module connects, and described induction coil and the second Differential OPAMP module connect, described second Differential OPAMP module and monolithic Machine processing module connects, and described display module, program import module and data derive module and are all connected with single chip processing module, Described power module is powered.
Further, also include that alarm modules, described alarm modules are made up of broadcasting unit and driver element thereof, described list Sheet machine processing module is connected with the driver element in alarm modules.Alarm modules, for reading the grounding resistance of reality, is being sent out During raw fault, it is also possible to for alarm.
Further, also bag key-press module, described key-press module is connected with single chip processing module.Key-press module is used for selecting Select mode of operation and setup parameter and marginal value, also there is power on/off function.
Further, described single chip processing module uses the single-chip microcomputer of MSP430fl49 model.This function of the MCU is strong Greatly, and low in energy consumption, energy-conserving and environment-protective.
Further, described data derive module and use MAX485 interface chip and RS485 interface.This chip and interface Be conducive to more distance data transmission.
Wired remote monitoring system, including above-mentioned earth resistance online monitoring alarm instrument, concentrator and monitoring host computer, Data in described earth resistance metering device are derived module and are connected with concentrator by netting twine, described concentrator pass through netting twine and Monitoring host computer connects.It is suitable for 1500 meters apart from interior monitoring, monitoring host computer can show tested grounding resistance constantly, permissible Arranging the automatic monitoring record time, the interval record time is 1 ~ 200 hour, and record data store form automatically, facilitate history to look into Inquiry, the situation of change of research and application point grounding resistance, can directly display measured value by LCD, it is also possible to set by detector Put warning marginal value, there is acousto-optic report.
Further, described earth resistance metering device and concentrator use modbus-rtu communication modes communication.Have The features such as long-range speed is fast.
Wireless remote control system, including above-mentioned earth resistance online monitoring alarm instrument, concentrator, wireless transmitter, Wireless receiver and monitoring host computer, the data in described earth resistance metering device derive module by netting twine with concentrator even Connecing, described concentrator is connected by netting twine wireless transmitter, and described wireless receiver is connected with monitoring host computer by netting twine.Wireless Network system is not by distance limit, and monitoring host computer can show tested grounding resistance constantly, can arrange automatic monitoring record Time, the interval record time is 1 ~ 200 hour, and record data store form automatically, facilitate historical query, research and application point ground connection The situation of change of resistance, can directly display measured value by LCD, it is also possible to arranges warning marginal value by detector, has Sound and light alarm.
Further, described wireless transmitter and wireless receiver use GSM/GPRS communication modes communication.GSM/GPRS Communication modes has the features such as long-range speed is fast.
Compared with prior art, the beneficial effects of the utility model are: without squeezing into the tradition side of auxiliary detection stake (3) Formula detects, thus the spent manpower when of avoiding construction, material resources, financial resources, greatly reduce use cost, former The equipment come needs manually to go to scene to measure, and this equipment both can be single neuron now, it is achieved simple function, it is possible to With realization networking that network technology and communication technology are combined, it is also possible to measurement result is preserved, facilitates the data in later stage Gather and safeguard, improve the overall control to equipment.
Accompanying drawing explanation
The construction module schematic diagram of the earth resistance metering device in Fig. 1 this utility model;
The construction module schematic diagram of the wired remote monitoring system in Fig. 2 this utility model;
The construction module schematic diagram of the wireless remote control system in Fig. 3 this utility model.
Detailed description of the invention
In conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail;
Embodiment 1 as it is shown in figure 1, earth resistance online monitoring alarm instrument, including:
Excitation coil, is used for producing alternating magnetic field so that producing electric current in earth lead;
First Differential OPAMP module, for amplification also output high-power driving source to drive excitation coil;
Induction coil, electric current in inductive grounding line also produces faradic current;
Second Differential OPAMP module, for being converted into induced voltage signal processing and amplifying by sensor current signal;
Single chip processing module, for producing a lower powered driving source and being transferred to the first Differential OPAMP module, It addition, receive the induced voltage signal of the second Differential OPAMP module transfer, carry out modulus process, read inductive voltage value, and According to the linear relationship of induced voltage Yu earth resistance, by inductive voltage value computing the actual earth resistance of inferring correspondence Value;
Display module, is used for showing actual grounding resistance;
Program imports module, runs program for importing single chip processing module and is implanted in the sense in this operation program Answer the linear relationship of voltage and earth resistance;
Data derive module, are used for deriving actual grounding resistance;
Power module, is used for providing different voltage;
Described excitation coil and the first Differential OPAMP module connect, at described first Differential OPAMP module and single-chip microcomputer Reason module connects, and described induction coil and the second Differential OPAMP module connect, described second Differential OPAMP module and monolithic Machine processing module connects, and described display module, program import module and data derive module and are all connected with single chip processing module, Described power module is powered.
In order to realize broadcasting function and alarm function, earth resistance online monitoring alarm instrument also includes alarm modules, described Alarm modules is made up of broadcasting unit and driver element thereof, and described single chip processing module is with the driver element in alarm modules even Connect.
The marginal value for switching working mode or inputting necessity and parameter, earth resistance online monitoring alarm instrument is also Bag key-press module, described key-press module is connected with single chip processing module.
On the basis of technique scheme, described single chip processing module uses the single-chip microcomputer of MSP430fl49 model, MSP430fl49 model single-chip microcomputer is the microcontroller of one group of super low-power consumption, and power supply voltage range is l.8 ~ 3.6V.In view of this Being designed with low-power consumption, small size, requirement that function is many, so selecting MSP430fl49, it has the RAM of ROM, 2K of 60K, has 8 channel sample rates are the l2 position A/D converter of 200K, hardware multiplier, 2 l6 with a large amount of capture/comparand registers Bit timing device, house dog etc., in the design, MSP430fl49 is the core of whole instrument, and the multichannel mainly completing signal is adopted Collection, software filtering, data operation, liquid crystal display, button and various control functions etc..MSP430fl49 is possible not only to realize individually Gather, and by amendment software can also form distributed wireless acquisition system. this Acquisition Instrument can apply to humiture and In the detection of toxic and harmful.
Described data derive module and use MAX485 interface chip and RS485 interface.RS485 has the special feature that (1) RS- The electrical characteristic of 485: use differential signal negative logic, logic " 1 " represents with the voltage difference of line-to-line for+(2 ~ 6) V;Logic " 0 " Represent with the voltage difference of line-to-line for-(2 ~ 6) V.Interface signal level reduces than RS-232-C, is just hardly damaged interface circuit Chip, and this level and Transistor-Transistor Logic level are compatible, can facilitate and be connected with TTL circuit.(2) data of RS-485 high-transmission speed Rate is 10Mbps.(3) RS-485 interface is to use balance driver and the combination of differential receiver, and anti-common mode disturbances ability increases By force, i.e. noise immunity is good.(4) communication distance maximum for RS-485 is about 1219m, and peak transfer rate is 10Mbps, passes Defeated speed is inversely proportional to transmission range, under the transfer rate of 100KbpS, just can reach maximum communication distance, if needed Transmit longer distance, need to add 485 repeaters.RS-485 bus is typically maximum supports 32 nodes, if using special 485 chips, can reach 128 or 256 nodes, and maximum can support 400 nodes.RS485 interface composition Half-duplex network, usually two-wire system (had four-wire system connection in the past, can only realize point-to-point communication mode, now seldom adopted With), many employing Shielded Twisted Pair transmission.This mode of connection is that bus type topological structure at most can mount on same bus 32 nodes.Being generally adopted by master-slave communication mode in RS485 communication network, i.e. one host tape is multiple from machine.Low Speed, short distance, glitch-free occasion can use common twisted-pair feeder, otherwise, when high speed, Long line transmission, then must use RS485 private cable (STP-120 Ω (for RS485 & CAN) the one pair 18 of impedance matching (generally 120 Ω) AWG), under interference rugged environment, armored type paired shield cable (ASTP-120 Ω (for RS485 & should also be used CAN) one pair 18 AWG).When using RS485 interface, for specific transmission line, from RS485 interface to load The baud rate that the maximum cable length that its data signal transmission is allowed transmits with signal is inversely proportional to, and this length data is mainly By distorted signals and noise etc., institute is affected.In theory, traffic rate 100Kbps and following time, the longer transmission distance of RS485 Up to 1200 meters, but the distance transmitted in actual applications is also because of chip and the transmission characteristic of cable and institute's difference.It is being transmitted across Journey can use the method increasing relaying signal is amplified, at most can add eight relayings, say, that in theory The maximum transmission distance of RS485 can reach 10.8 kilometers.
Embodiment 2 is as in figure 2 it is shown, wired remote monitoring system, including the earth resistance on-line monitoring report in embodiment 1 Alert instrument, concentrator and monitoring host computer, the data in described earth resistance metering device derive module by netting twine with concentrator even Connecing, described concentrator is connected with monitoring host computer by netting twine, and described earth resistance metering device and concentrator use modbus- Rtu communication modes communication.Preferably, can include that multiple earth resistance metering device, described monitoring host computer are provided with monitoring soft Part, can monitor in real time and preserve data.
Embodiment 3 is as it is shown on figure 3, wireless remote control system, including the earth resistance on-line monitoring report in embodiment 1 Alert instrument, concentrator, wireless transmitter, wireless receiver and monitoring host computer, the data in described earth resistance metering device derive Module is connected with concentrator by netting twine, and described concentrator is connected by netting twine wireless transmitter, and described wireless receiver passes through Netting twine is connected with monitoring host computer, and described wireless transmitter and wireless receiver use GSM/GPRS communication modes communication, can wrap Including multiple earth resistance metering device, described monitoring host computer is provided with monitoring software, can monitor in real time and preserve data.
It is embodied as case described in this utility model and is only preferable case study on implementation of the present utility model, be not used for Limiting practical range of the present utility model, the most all equivalences made according to the content of this utility model claim change and repair Decorations, all should be used as technology category of the present utility model.

Claims (9)

1. earth resistance online monitoring alarm instrument, it is characterised in that including:
Excitation coil, is used for producing alternating magnetic field so that producing electric current in earth lead;
First Differential OPAMP module, for amplification also output high-power driving source to drive excitation coil;
Induction coil, electric current in inductive grounding line also produces faradic current;
Second Differential OPAMP module, for being converted into induced voltage signal processing and amplifying by sensor current signal;
Single chip processing module, for producing a lower powered driving source and being transferred to the first Differential OPAMP module, it addition, Receive the induced voltage signal of the second Differential OPAMP module transfer, carry out modulus process, read inductive voltage value, and according to sense Answer the linear relationship of voltage and earth resistance, by inductive voltage value computing and infer correspondence actual grounding resistance;
Display module, is used for showing actual grounding resistance;
Program imports module, runs program for importing single chip processing module and is implanted in the faradism in this operation program Pressure and the linear relationship of earth resistance;
Data derive module, are used for deriving actual grounding resistance;
Power module, is used for providing different voltage;
Described excitation coil and the first Differential OPAMP module connect, and described first Differential OPAMP module processes mould with single-chip microcomputer Block connects, and described induction coil and the second Differential OPAMP module connect, at described second Differential OPAMP module and single-chip microcomputer Reason module connects, and described display module, program import module and data derive module and are all connected with single chip processing module, described Power module is powered.
2. earth resistance online monitoring alarm instrument as claimed in claim 1, it is characterised in that also include alarm modules, described Alarm modules is made up of broadcasting unit and driver element thereof, and described single chip processing module is with the driver element in alarm modules even Connect.
3. earth resistance online monitoring alarm instrument as described in claim 1 or 2, it is characterised in that also bag key-press module, Described key-press module is connected with single chip processing module.
4. earth resistance online monitoring alarm instrument as claimed in claim 3, it is characterised in that described single chip processing module Use the single-chip microcomputer of MSP430fl49 model.
5. earth resistance online monitoring alarm instrument as claimed in claim 4, it is characterised in that described data derive module and adopt With MAX485 interface chip and RS485 interface.
6. wired remote monitoring system, it is characterised in that include the earth resistance online monitoring alarm instrument described in claim 5, Concentrator and monitoring host computer, the data in described earth resistance metering device are derived module and are connected with concentrator by netting twine, institute State concentrator to be connected with monitoring host computer by netting twine.
7. wired remote monitoring system as claimed in claim 6, it is characterised in that described earth resistance metering device and concentration Device uses modbus-rtu communication modes communication.
8. wireless remote control system, it is characterised in that include the earth resistance online monitoring alarm instrument described in claim 5, Concentrator, wireless transmitter, wireless receiver and monitoring host computer, the data in described earth resistance metering device derive module leads to Crossing netting twine to be connected with concentrator, described concentrator is connected by netting twine wireless transmitter, described wireless receiver by netting twine with Monitoring host computer connects.
9. wireless remote control system as claimed in claim 8, it is characterised in that described wireless transmitter and wireless receiver Use GSM/GPRS communication modes communication.
CN201620097469.6U 2016-01-29 2016-01-29 Ground resistance on -line monitoring alarm and remote monitering system Active CN205656241U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620097469.6U CN205656241U (en) 2016-01-29 2016-01-29 Ground resistance on -line monitoring alarm and remote monitering system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620097469.6U CN205656241U (en) 2016-01-29 2016-01-29 Ground resistance on -line monitoring alarm and remote monitering system

Publications (1)

Publication Number Publication Date
CN205656241U true CN205656241U (en) 2016-10-19

Family

ID=57355723

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620097469.6U Active CN205656241U (en) 2016-01-29 2016-01-29 Ground resistance on -line monitoring alarm and remote monitering system

Country Status (1)

Country Link
CN (1) CN205656241U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105717366A (en) * 2016-01-29 2016-06-29 南京尚志电子科技有限公司 Online grounding resistance monitoring alarm and remote monitoring system
CN110398263A (en) * 2019-07-16 2019-11-01 武汉鑫诚欣科技有限公司 A kind of synthetical collection instrument and acquisition method improving measuring accuracy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105717366A (en) * 2016-01-29 2016-06-29 南京尚志电子科技有限公司 Online grounding resistance monitoring alarm and remote monitoring system
CN110398263A (en) * 2019-07-16 2019-11-01 武汉鑫诚欣科技有限公司 A kind of synthetical collection instrument and acquisition method improving measuring accuracy

Similar Documents

Publication Publication Date Title
CN102841260B (en) DC microresistivity measuring system
CN105717366A (en) Online grounding resistance monitoring alarm and remote monitoring system
CN205656241U (en) Ground resistance on -line monitoring alarm and remote monitering system
CN103076560B (en) Electrical test equipment non-contact measurement combination unit and application thereof
CN205581212U (en) Power battery internal resistance on -line monitoring system
CN206945867U (en) A kind of line loss real time monitoring apparatus
CN203324400U (en) Electric appliance energy consumption metering system
CN205809615U (en) The motor speed of a kind of pump and the control device of flow measurement
CN206096216U (en) Prevent outside permanent magnetic field interference electric energy meter
CN107203152A (en) A kind of energy-saving device and economize on electricity weight testing method
CN103995208A (en) Direct current leakage monitoring and alarming device
CN203811737U (en) Direct-current electric-leakage monitoring and warning device
CN207779328U (en) A kind of bridge stress measurement system based on wireless transmission
CN207181565U (en) Electric power terminal detector
CN207036924U (en) Electric energy measurement multilevel iudge device
CN206638287U (en) A kind of variable frequency excitation mode two-wire system electromagnetic flowmeter
CN104777368B (en) AC frequency conversion stake resistance on-line computing model and detection method
CN206945841U (en) The detection means of harmonic-eliminating resistor
CN206020537U (en) A kind of multi-electrode adaptive measuring ground resistance apparatus
CN201893019U (en) Intelligent single-phase full-electric quantity transducer
CN205642673U (en) A temperature check gauge for main transformer
CN108809357A (en) A kind of power carrier communication scene inspection device
CN201247279Y (en) Device for measuring grounding voltage of power distribution network overhead line
CN208255308U (en) A kind of double-range power consumption test circuit of pacemaker
CN204189301U (en) A kind of high voltage electric equipment temperature monitoring system

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model