CN205720417U - A kind of triple channel contactless below 1000V voltage measuring apparatus - Google Patents
A kind of triple channel contactless below 1000V voltage measuring apparatus Download PDFInfo
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- CN205720417U CN205720417U CN201620605143.XU CN201620605143U CN205720417U CN 205720417 U CN205720417 U CN 205720417U CN 201620605143 U CN201620605143 U CN 201620605143U CN 205720417 U CN205720417 U CN 205720417U
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Abstract
The utility model discloses a kind of triple channel contactless below 1000V voltage measuring apparatus, circuit includes the storage of sensor, discharge circuit, difference channel, measuring circuit, voltage signal observer, data and output module, the outfan of described sensor passes sequentially through current loop, difference channel, measuring circuit and then the input with voltage signal observer and is connected, and the outfan of voltage signal observer is connected with the input of data storage and output module.This utility model avoids the manpower and materials owing to needing foundation electrical connection to be spent, and uses contactless voltage detecting technology, greatly simplify the installation process of voltage collecting device.In combination with ZigBee wireless communication module, this device is made to support scope remote, wide, the wireless remote monitering function of many test points, possess the plurality of advantages such as high efficiency and intuitive, facilitate power department to grasp the running status of low-voltage network in real time, there is social benefit widely.
Description
Technical field
This utility model relates to power electronics measuring instrument field, particularly relate to a kind of contactless 1000V of triple channel with
Lower voltage measuring apparatus.
Background technology
Electric energy, as being currently being widely used clean energy resource, all plays act foot light in city life staying idle at home and commercial production
The effect of weight.Along with China enters the new industrialization epoch, need for electricity is continuing to increase, and the scale of low-voltage network is the most therewith
Expanding year by year, the stability of power supply is just particularly important.
But the use of the impact load such as the irregular access of a large amount of non-linear power equipment and electric arc furnace, directly result in
Mains ripple, voltage waveform is distorted, and seriously reduces the stability of low-voltage distribution network operation.This makes power supply department
The voltage parameter gathering low-voltage network is needed to be analyzed and enter a judgement response, to greatest extent the outer bound pair power distribution network of reduction
Pollution.
But, current voltage detection device mostly is contact type measurement, i.e. requires that wire extracts access device to be carried out
Voltage measurement, this measuring method there is problems in that
1, install very inconvenient, lay test point relatively costly；
2, there is electrical contact between tested wire and test equipment, if operational error, be likely to result in short circuit or touch
Electrification；
3, wire extracts needs to destroy power transmission line insulating barrier, produces potential safety hazard.
Utility model content
In order to solve above-mentioned technical problem, the purpose of this utility model is: provide a kind of easy for installation, have and necessarily measure essence
Spend and can support the triple channel contactless low-voltage measurement apparatus of wireless remote monitering.
This utility model solves its technical problem and be the technical scheme is that
A kind of triple channel contactless below 1000V voltage measuring apparatus, including:
Tiny signal detector: for the Weak current signal that amount detection level is μ A, and it is amplified and difference
Computing；
Voltage signal observer: for being processed by the voltage signal that tiny signal detector exports, utilize small electric
Stream obtains the voltage effective value in wire to be measured with the quantitative relation of voltage to be measured；
Data storage and output module: the data that voltage signal observer exports are stored, and by wired or nothing
The mode of line carries out data output；
Further, described tiny signal detector includes:
Sensor: include the first metallic plate and the second metallic plate, the 3rd metallic plate, described first metallic plate is directly connected to fortune
Putting circuit input end, described second metallic plate and the 3rd metallic plate paste mica sheet known to thickness difference and dielectric constant respectively
Being connected with discharge circuit another two input afterwards, described first metallic plate and the second metallic plate, the 3rd metallic plate are placed side by side one
On individual pliers, it is fixed on wire to be measured by pliers during use, provides path for small leakage current；
Discharge circuit: for three the Weak current signals flowing through described sensor are amplified and are converted to voltage signal；
Difference channel: the voltage signal amplified by discharge circuit is subtracted each other the external interference being jointly subjected to counteracting, is divided into
The voltage in the second loop, metallic plate place and the 3rd loop, metallic plate place is subtracted each other by the two groups: 1st group；2nd group by the first metal
The voltage in loop, plate place and the 3rd loop, metallic plate place subtracts each other；
Measuring circuit: for the difference in voltage that difference channel exports is measured and carries out analog digital conversion.
Further, described discharge circuit uses LM324.
Further, described difference channel is made up of sampling resistor and subtraction circuit, and described subtraction circuit is by operation amplifier
Device, resistance and electric capacity composition.
Further, the storage of described data and output module include ZigBee wireless communication module.
Further, the storage of described data and output module include USB output module.
Further, the storage of described data and output module include SD card memory module.
Compared to existing technology, the beneficial effects of the utility model are:
Triple channel contactless low-voltage measurement apparatus easy for installation that this utility model provides, only need to clamp pliers
Wire to be measured, makes sensor tightly fit on wire, it is possible to obtain the voltage data of circuit, because without building again
Standing electrical connection, the installation of equipment and use become very convenient, can lay substantial amounts of test point with relatively low human cost,
And the magnitude of voltage of each time point can be recorded；Simultaneously because be provided with ZigBee wireless communication module, so this device is supported
At a distance, wide scope, the wireless remote monitering function of many test points, possess the plurality of advantages such as high efficiency and intuitive, convenient electricity
Power department grasps the running status of low-voltage network in real time, has social benefit widely.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of a kind of triple channel of this utility model contactless below 1000V voltage measuring apparatus；
Fig. 2 is the tiny signal detection of a kind of triple channel of this utility model contactless below 1000V voltage measuring apparatus
The composition of device.
Fig. 3 is that the data of a kind of triple channel of this utility model contactless below 1000V voltage measuring apparatus store with defeated
Go out the composition of module.
Fig. 4 is sensor construction schematic diagram.
Fig. 5 is discharge circuit, the circuit diagram of difference channel.
Shown in figure it is: 1-the first metallic plate；2-wire to be measured；3-pliers；4-the second metallic plate；5-the 3rd metallic plate.
Detailed description of the invention
Being described in further detail the purpose of this utility model below by specific embodiment, embodiment can not be at this
Repeat one by one, but the most therefore embodiment of the present utility model is defined in following example.
Shown in seeing figures.1.and.2, a kind of triple channel contactless below 1000V voltage measuring apparatus, including tiny signal
The storage of detector, voltage signal observer, data and output module, the outfan of described tiny signal detector and voltage signal
The input of observer connects, and the circuit of described tiny signal detector realizes on a pcb board, and described voltage signal is observed
Device is integrated on a FPGA plate with data storage and output module.
Described tiny signal detector includes:
Sensor: as shown in Figure 4, sensor includes the first metallic plate 1 and the second metallic plate the 4, the 3rd metallic plate 5, described
First metallic plate 1 is directly connected to discharge circuit input, and described second metallic plate 4 and the 3rd metallic plate 5 paste thickness not respectively
With and dielectric constant known to be connected with discharge circuit another two input after mica sheet, described first metallic plate 1 and the second gold medal
Belong to plate the 4, the 3rd metallic plate 5 to be placed side by side on a pliers 3, be fixed on wire 2 to be measured, for small by pliers 3 during use
Leakage current provide path；
Discharge circuit: for three Weak current signals of flows through sensor are amplified and are converted to voltage signal, by transporting
Put LM324 to realize；
Difference channel: the voltage signal amplified by discharge circuit is subtracted each other the external interference being jointly subjected to counteracting.It is divided into
The voltage in the second loop, metallic plate 4 place and the 3rd loop, metallic plate 5 place is subtracted each other by the two groups: 1st group；2nd group by the first gold medal
The voltage belonging to loop, plate 1 place and the 3rd loop, metallic plate 5 place subtracts each other；
Measuring circuit: for the difference in voltage that difference channel exports is measured and carries out analog digital conversion.
Wherein, C in figure0For equivalent capacity intrinsic between wire and sensor, C1 C2For the known capacitance on sensor, namely
Mica sheet.
As it is shown in figure 5, described discharge circuit, difference channel are made up of sampling resistor and subtraction circuit, described subtraction circuit
It is made up of operational amplifier, resistance.
With reference to Fig. 3, the storage of described data and output module are connected to ZigBee wireless communication module, USB output module, SD card
Memory module.
In an embodiment of the present utility model, a kind of triple channel contactless below 1000V voltage measuring apparatus by
The storage of tiny signal detector, voltage signal observer, data and output module are constituted.
Wherein, tiny signal detectors measure goes out the wechat electric current letter caused by voltage difference between wire to be measured and sensor
Number, it is amplified and calculus of differences, it is achieved analog digital conversion.And the digital signal after conversion is sent to voltage signal observer.
The digital signal received is processed by voltage signal observer, according to the quantitative relation of Weak current signal Yu voltage to be measured
Obtain the voltage effective value in wire to be measured, and transmit data to data storage and output module.Data storage and output mould
The data that voltage signal observer exports are stored in SD card by block.
In another embodiment of the present utility model, a kind of triple channel contactless below 1000V voltage measuring apparatus
It is made up of tiny signal detector, voltage signal observer, data storage and output module.
Wherein, tiny signal detectors measure goes out the wechat electric current letter caused by voltage difference between wire to be measured and sensor
Number, it is amplified and calculus of differences, it is achieved analog digital conversion.And the digital signal after conversion is sent to voltage signal observer.
The digital signal received is processed by voltage signal observer, according to the quantitative relation of Weak current signal Yu voltage to be measured
Obtain the voltage effective value in wire to be measured, and transmit data to data storage and output module.Data storage and output mould
The data that voltage signal observer exports are transferred out by block by USB wired mode.
In another embodiment of the present utility model, a kind of triple channel contactless below 1000V voltage measuring apparatus
It is made up of tiny signal detector, voltage signal observer, data storage and output module.
Wherein, tiny signal detectors measure goes out the wechat electric current letter caused by voltage difference between wire to be measured and sensor
Number, it is amplified and calculus of differences, it is achieved analog digital conversion.And the digital signal after conversion is sent to voltage signal observer.
The digital signal received is processed by voltage signal observer, according to the quantitative relation of Weak current signal Yu voltage to be measured
Obtain the voltage effective value in wire to be measured, and transmit data to data storage and output module.Data storage and output mould
The data that voltage signal observer exports are gone out by block by Zigbee wireless way for transmitting.
Wherein, the operation principle of tiny signal detector is as follows:
The sensor comprising 3 metallic plates is fixed on wire to be measured by pliers, due between sensor and wire to be measured
There is voltage difference, metallic plate will flow through the Weak current that the order of magnitude is μ A；Discharge circuit is small by flow through on 3 metallic plates
Current signal amplifies and is converted to voltage signal；By difference channel, voltage is subtracted each other the external world being jointly subjected to counteracting again to do
Disturb, be divided into the two groups: 1st group to be subtracted each other by the voltage in the second loop, metallic plate place and the 3rd loop, metallic plate place；2nd group by
The voltage in one loop, metallic plate place and the 3rd loop, metallic plate place subtracts each other；Finally by measuring circuit, difference channel is exported
Difference in voltage measures.
The realization of above-described embodiment is not related to the improvement to program or agreement, all real by hardware and existing functional module
Existing.
Above-described embodiment of the present utility model is only for clearly demonstrating this utility model example, and is not
Restriction to embodiment of the present utility model.For those of ordinary skill in the field, on the basis of described above
On can also make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.
All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, should be included in this reality
Within novel scope of the claims.
Claims (7)
1. triple channel contactless below a 1000V voltage measuring apparatus, it is characterised in that including:
Tiny signal detector: for the Weak current signal that amount detection level is μ A, and it is amplified and calculus of differences；
Voltage signal observer: for by tiny signal detector export voltage signal process, utilize Weak current with
The quantitative relation of voltage to be measured obtains the voltage effective value in wire to be measured；
Data storage and output module: the data that voltage signal observer exports are stored, and by wired or wireless
Mode carries out data output.
A kind of triple channel contactless below 1000V voltage measuring apparatus the most according to claim 1, it is characterised in that
Described tiny signal detector includes:
Sensor: include the first metallic plate and the second metallic plate, the 3rd metallic plate, described first metallic plate is directly connected to amplifier electricity
Road input, described second metallic plate and the 3rd metallic plate paste that thickness is different respectively and after mica sheet known to dielectric constant with
Discharge circuit another two input connects, and described first metallic plate and the second metallic plate, the 3rd metallic plate are placed side by side pincers
On son, it is fixed on wire to be measured by pliers during use, provides path for small leakage current；
Discharge circuit: for three the Weak current signals flowing through described sensor are amplified and are converted to voltage signal；
Difference channel: the voltage signal amplified by discharge circuit is subtracted each other the external interference being jointly subjected to counteracting, is divided into two groups:
The voltage in the second loop, metallic plate place and the 3rd loop, metallic plate place is subtracted each other by the 1st group；2nd group by the first metallic plate place
The voltage in loop and the 3rd loop, metallic plate place subtracts each other；
Measuring circuit: for the difference in voltage that difference channel exports is measured and carries out analog digital conversion.
A kind of triple channel contactless below 1000V voltage measuring apparatus the most according to claim 2, it is characterised in that:
Described discharge circuit uses LM324.
A kind of triple channel contactless below 1000V voltage measuring apparatus the most according to claim 2, it is characterised in that:
Described difference channel is made up of sampling resistor and subtraction circuit, and described subtraction circuit is made up of operational amplifier, resistance and electric capacity.
A kind of triple channel contactless below 1000V voltage measuring apparatus the most according to claim 1, it is characterised in that:
The storage of described data and output module include ZigBee wireless communication module.
A kind of triple channel contactless below 1000V voltage measuring apparatus the most according to claim 1, it is characterised in that:
The storage of described data and output module include USB output module.
A kind of triple channel contactless below 1000V voltage measuring apparatus the most according to claim 1, it is characterised in that:
The storage of described data and output module include SD card memory module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620605143.XU CN205720417U (en) | 2016-06-16 | 2016-06-16 | A kind of triple channel contactless below 1000V voltage measuring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620605143.XU CN205720417U (en) | 2016-06-16 | 2016-06-16 | A kind of triple channel contactless below 1000V voltage measuring apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974188A (en) * | 2016-06-16 | 2016-09-28 | 华南理工大学 | Three-channel noncontact lower-than-1000V voltage measurement device |
| CN109387686A (en) * | 2018-11-01 | 2019-02-26 | 华南理工大学 | A kind of contactless tension measuring circuit |
| CN109541283A (en) * | 2018-11-01 | 2019-03-29 | 华南理工大学 | A kind of contactless voltage measurement system and method |
| CN114200199A (en) * | 2021-11-26 | 2022-03-18 | 电子科技大学 | Non-contact voltage measuring device based on multi-stage plate differential probe |
-
2016
- 2016-06-16 CN CN201620605143.XU patent/CN205720417U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974188A (en) * | 2016-06-16 | 2016-09-28 | 华南理工大学 | Three-channel noncontact lower-than-1000V voltage measurement device |
| CN109387686A (en) * | 2018-11-01 | 2019-02-26 | 华南理工大学 | A kind of contactless tension measuring circuit |
| CN109541283A (en) * | 2018-11-01 | 2019-03-29 | 华南理工大学 | A kind of contactless voltage measurement system and method |
| CN109541283B (en) * | 2018-11-01 | 2020-12-29 | 华南理工大学 | Non-contact voltage measurement system and method |
| CN109387686B (en) * | 2018-11-01 | 2024-01-26 | 华南理工大学 | Non-contact voltage measurement circuit |
| CN114200199A (en) * | 2021-11-26 | 2022-03-18 | 电子科技大学 | Non-contact voltage measuring device based on multi-stage plate differential probe |
| CN114200199B (en) * | 2021-11-26 | 2022-09-06 | 电子科技大学 | Non-contact voltage measuring device based on multi-stage plate differential probe |
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