CN205643499U - Current measuring device of power network neutral point - Google Patents
Current measuring device of power network neutral point Download PDFInfo
- Publication number
- CN205643499U CN205643499U CN201620214693.9U CN201620214693U CN205643499U CN 205643499 U CN205643499 U CN 205643499U CN 201620214693 U CN201620214693 U CN 201620214693U CN 205643499 U CN205643499 U CN 205643499U
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- China
- Prior art keywords
- measuring device
- contact probe
- current measuring
- microprocessor
- display
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Abstract
The utility model provides a current measuring device of power network neutral point, the device includes power and the display that is used for showing the current value, the device still includes non -contact probe and microprocessor, wherein, the power does the display microprocessor and the power supply of non -contact probe, the display with non -contact probe all with microprocessor links to each other, the non -contact probe includes along the casing of lengthwise extension, the lower wall of casing inwards caves in to form and is used for the holding to be surveyed the recess of wire, directly over the recess predetermine position department be provided with be used for the response survey the sensor chip in the magnetic field of wire internal current production, sensor chip with be located power amplifier circuit in the casing links to each other. The embodiment of the utility model provides a current measuring device of power network neutral point, electric current that can be under the condition that does not insert the measurand circuit, in the accurate measurement circuit.
Description
Technical field
This utility model relates to measuring instrument technical field, particularly to the current measuring device of a kind of power network neutral point.
Background technology
In power system, the electric current of power network neutral point is detected and other industry, civil equipment or circuit are carried out
During maintenance, repair, it is often necessary to measuring circuit flows through the size of electric current.At present, the method generally testing electric current is to test
Instrument is connected with circuit-under-test, makes current flow through test instrunment such that it is able to obtain measurement result.Such as conventional is mutual by electric current
Sensor is measured electric current and measures the modes such as electric current with circuit tester.
But, test instrunment is in series with measurand, in addition to there is the shortcoming that wiring is inconvenient, at the electricity of measurand
Road is accessed test instrunment, often changes the circuit environment residing for measurand, make measurement result be affected.It addition, also
Easily misoperation is caused to cause measuring instrument to be damaged because of the reason of human negligence.
The problems referred to above are also there is not to effective solution.
It should be noted that introduction to technical background above be intended merely to convenient the technical solution of the utility model is carried out clear, complete
Whole explanation, and facilitate the understanding of those skilled in the art to illustrate.Can not be merely because these schemes be of the present utility model
Background section is set forth and thinks that technique scheme is known to those skilled in the art.
Utility model content
The purpose of this utility model embodiment is to provide the current measuring device of a kind of power network neutral point, with do not access tested
Electric current in the case of object circuit, in accurate measuring circuit.
The current measuring device of a kind of power network neutral point that this utility model embodiment provides is achieved in that
The current measuring device of a kind of power network neutral point, including power supply with for showing the display of current value, described device is also
Including non-contact probe and microprocessor, wherein, described power supply is described display, described microprocessor and described noncontact
Probe power supply, described display is all connected with described microprocessor with described non-contact probe, and described non-contact probe includes along vertical
The long housing extended, the lower wall of described housing caves inward formation for housing the groove of tested wire, directly over described groove
Predetermined position is provided with the sensor chip in the magnetic field that electric current produces, described sensor chip in sensing described tested wire
It is connected with the power amplifier being positioned at described housing.
Preferably, the axial line of described housing is parallel to each other with the axial line of described groove and is positioned on same perpendicular.
Preferably, described device also includes that wireless communication module, described wireless communication module are connected with described microprocessor.
Preferably, described wireless communication module includes bluetooth module, infrared rays communication module, WiFi module or purple honeybee ZigBee
At least one in module.
Preferably, described display includes 6 seven segment digital tubes.
The current measuring device of a kind of power network neutral point that this utility model embodiment provides, by non-contact probe, by tested
The wire of object is limited in groove, owing to the electric current in wire can produce magnetic field around wire, therefore can pass through sensor
The magnetic field that in chip sensor wire, electric current produces, such that it is able to generate the analogue signal corresponding with the magnetic field of sensing.This simulation is believed
Can be processed by microprocessor after number being amplified by power amplifier, to generate the current value of electric current in wire, such that it is able to will
The current value generated is shown by display.Therefore, a kind of power network neutral point that this utility model embodiment provides
Current measuring device, can electric current in the case of not accessing measurand circuit, in accurate measuring circuit.
With reference to explanation hereinafter and accompanying drawing, disclose in detail particular implementation of the present utility model, specify of the present utility model
Principle can be in adopted mode.It should be understood that embodiment of the present utility model is not so limited in scope.?
In the range of the spirit and terms of claims, embodiment of the present utility model includes many changes, revises and be equal to.
Describe for a kind of embodiment and/or the feature that illustrates can be in same or similar mode one or more other
Embodiment uses, combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term " includes/comprises " existence referring to feature, one integral piece, step or assembly herein when using, but not
Get rid of the existence of one or more further feature, one integral piece, step or assembly or additional.
Accompanying drawing explanation
Included accompanying drawing is used for providing being further understood from this utility model embodiment, which constitutes of description
Point, it is used for illustrating embodiment of the present utility model, and comes together to explain principle of the present utility model with word description.Aobvious and easy
Insight, the accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:
The structural representation of the current measuring device of a kind of power network neutral point that Fig. 1 provides for this utility model；
The sectional drawing of non-contact probe in the current measuring device of a kind of power network neutral point that Fig. 2 provides for this utility model；
The side view of non-contact probe in the current measuring device of a kind of power network neutral point that Fig. 3 provides for this utility model.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with this utility model
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that described
Embodiment be only a part of embodiment of this utility model rather than whole embodiments.Based on the enforcement in this utility model
Example, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to
Scope in this utility model protection.
The current measuring device structural representation of a kind of power network neutral point that Fig. 1 provides for this utility model.Fig. 2 is this practicality
The sectional drawing of non-contact probe in the current measuring device of a kind of power network neutral point of novel offer.Fig. 3 is that this utility model carries
The side view of non-contact probe in the current measuring device of a kind of power network neutral point of confession.As shown in Figure 1 to Figure 3, described electricity
Flow measuring apparatus can include power supply 1 and for showing the display 2 of current value, and described device also includes non-contact probe 3 He
Microprocessor 4, wherein, described power supply 1 is that described display 2, described microprocessor 4 and described non-contact probe 3 supply
Electricity, described display 2 is all connected with described microprocessor 4 with described non-contact probe 3, and described non-contact probe 3 includes edge
The housing 31 that lengthwise extends, the lower wall of described housing 31 caves inward and is formed for housing the groove 32 of tested wire, described recessed
Predetermined position directly over groove 32 is provided with the sensor chip 33 in the magnetic field that electric current produces in sensing described tested wire,
Described sensor chip 33 is connected with the power amplifier 34 being positioned at described housing 31.
In the present embodiment, described housing 31 can be a director circle cylinder, can offer use in this accurate cylindrical lower section
Groove 32 in accommodating tested wire.When utilizing described current measuring device that the electric current in tested wire is measured, permissible
Tested wire is embedded in described groove 32, the trend of described tested wire can with the axial line of described groove 32 move towards phase
With.So, the electric current in tested wire can around wire generation magnetic field, this magnetic field can be positioned at described groove 32
The sensor chip 33 of surface predetermined position detects.Electric current in sensor chip 33 detects tested wire produces
Behind magnetic field, the analogue signal corresponding with described magnetic field can be generated.In order to avoid this analogue signal in transmittance process owing to declining
Subtract and cause measurement error, after this analogue signal can being amplified by power amplifier 34, be sent in microprocessor 4.
Described microprocessor 4 can arrange sample circuit, with to described analog signal sampling and quantization, thus by described simulation
Signal is converted to digital signal.The digital signal being converted to can be sent at described display 2, such that it is able to by described aobvious
Show that the current value in tested wire is shown by device 2.Described display 2 can include 6 seven segment digital tubes, described display
Device 2 can be controlled by described microprocessor 4, receives control signal at described microprocessor 4, thus on seven segment digital tubes
Demonstrate correct current value.
In the present embodiment, described power supply 1 can be model be the aneroid battery that magnitude of voltage is 9V of GP1604G-S1, logical
Cross and this aneroid battery is carried out blood pressure lowering process, such that it is able to obtain the DC voltage of 5V and 3.3V, with to described display 2, institute
State the sensor chip 33 in microprocessor 4 and described non-contact probe and power amplifier 34 is powered.
In the present embodiment, described sensor chip 33 can be model be the integrated chip of MLX91295, this chip energy
The maximum current of enough detections can be 30A.The magnetic field that exchange or direct current generate can be detected by this chip, and permissible
Produce the analogue signal of the substantially linear proportional to described magnetic field, such that it is able to obtain tested wire by such method measurement
The size of middle electric current.
In the present embodiment, described microprocessor 4 can be model be the one chip microcomputer of MSP430f169, this miniature list
12 high-precision analog digital conversion interfaces it are provided with, such that it is able to the analogue signal generating sensor chip 33 is carried out in sheet machine
Sampling processing, to obtain the digital signal of correspondence.
In this utility model one preferred embodiment, the axial line of described housing 31 is parallel to each other with the axial line of described groove 32
And it is positioned on same perpendicular.Tested wire in the most described groove 32 may be located at the middle of housing 31, thus
The magnetic field size that in tested wire, electric current produces can be detected exactly.
In this utility model one preferred embodiment, described device also includes wireless communication module 5, described wireless communication module with
Described microprocessor is connected.Wherein, described wireless communication module include bluetooth module, infrared rays communication module, WiFi module or
At least one in person's purple honeybee ZigBee module.By described wireless communication module 5, the electricity that microprocessor 4 can will detect
Flow valuve is wirelessly transmitted in Terminal Server Client, and can obtain control instruction at Terminal Server Client, such that it is able to realize survey
The remote control of amount device.
Therefore, the current measuring device of a kind of power network neutral point that this utility model embodiment provides, visited by noncontact
Head, is limited to the wire of measurand in groove, owing to the electric current in wire can produce magnetic field around wire, the most permissible
The magnetic field produced by electric current in sensor chip sensor wire, such that it is able to generate the simulation letter corresponding with the magnetic field of sensing
Number.This analogue signal can be processed by microprocessor after being amplified by power amplifier, to generate the current value of electric current in wire,
Such that it is able to the current value of generation is shown by display.Therefore, a kind of electricity that this utility model embodiment provides
The current measuring device of power net neutral point, can electric current in the case of not accessing measurand circuit, in accurate measuring circuit.
Above various embodiments of the present utility model are described and be supplied to those skilled in the art with the purpose described.Its not purport
It is being exhaustive or is being not intended to be limited to this utility model single disclosed embodiment.As it has been described above, this utility model
Various replacements and change will be apparent from for above-mentioned technology one of ordinary skill in the art.Therefore, although had
Body discusses the embodiment of some alternatives, but other embodiment will be apparent from, or those skilled in the art's phase
To easily drawing.This utility model is intended to be included in these of the present utility model all replacements discussed, amendment and change,
And other embodiment in the spirit and scope of above-mentioned application that falls.
Claims (5)
1. a current measuring device for power network neutral point, including power supply with for showing the display of current value, its feature
Being, described device also includes non-contact probe and microprocessor, and wherein, described power supply is described display, described micro-process
Device and described non-contact probe are powered, and described display is all connected with described microprocessor with described non-contact probe, described non-
Contact probe head includes the housing extended along lengthwise, and the lower wall of described housing caves inward and formed for housing the groove of tested wire,
Predetermined position directly over described groove is provided with the sensor core in the magnetic field that electric current produces in sensing described tested wire
Sheet, described sensor chip is connected with the power amplifier being positioned at described housing.
Current measuring device the most according to claim 1, it is characterised in that the axial line of described housing and described groove
Axial line be parallel to each other and be positioned on same perpendicular.
Current measuring device the most according to claim 1, it is characterised in that described device also includes wireless communication module,
Described wireless communication module is connected with described microprocessor.
Current measuring device the most according to claim 3, it is characterised in that described wireless communication module includes bluetooth mould
At least one in block, infrared rays communication module, WiFi module or purple honeybee ZigBee module.
Current measuring device the most according to claim 1, it is characterised in that described display includes 6 seven segment numericals
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620214693.9U CN205643499U (en) | 2016-03-18 | 2016-03-18 | Current measuring device of power network neutral point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620214693.9U CN205643499U (en) | 2016-03-18 | 2016-03-18 | Current measuring device of power network neutral point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205643499U true CN205643499U (en) | 2016-10-12 |
Family
ID=57077602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620214693.9U Expired - Fee Related CN205643499U (en) | 2016-03-18 | 2016-03-18 | Current measuring device of power network neutral point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205643499U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162141A (en) * | 2020-09-27 | 2021-01-01 | 济南浪潮高新科技投资发展有限公司 | Current detection device and circuit detection method |
-
2016
- 2016-03-18 CN CN201620214693.9U patent/CN205643499U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162141A (en) * | 2020-09-27 | 2021-01-01 | 济南浪潮高新科技投资发展有限公司 | Current detection device and circuit detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170318 |
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| CF01 | Termination of patent right due to non-payment of annual fee |