CN208239511U - A kind of tong-type ammeter based on Hall effect - Google Patents
A kind of tong-type ammeter based on Hall effect Download PDFInfo
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- CN208239511U CN208239511U CN201820413023.9U CN201820413023U CN208239511U CN 208239511 U CN208239511 U CN 208239511U CN 201820413023 U CN201820413023 U CN 201820413023U CN 208239511 U CN208239511 U CN 208239511U
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Abstract
The utility model discloses a kind of tong-type ammeters based on Hall effect, including Hall binding clip, sampling resistor and control mould group, wherein Hall binding clip measures electric current by Hall element, obtains sample rate current；Sample rate current is converted sampled voltage by sampling resistor；It controls mould group and sampled voltage is subjected to signal processing, obtain the numerical value of measurement electric current；Its connection relationship is as follows: Hall binding clip is passed through on tested conducting wire, the output end of Hall binding clip is electrically connected with one end of sampling resistor；The other end of sampling resistor is electrically connected with the input terminal of control mould group.The utility model has the beneficial effects that 1. jaw shapes being engaged using improved dentation, it can be to avoid jaw opening void dimension fluid the problem of causing entire magnetic circuit reluctance unstable and then influencing accuracy correction；2. Hall chip is placed in the centre of two a quarter circle magnetic cores, void dimension is fixed, and trueness error is stablized, and amendment is easy.
Description
Technical field
The utility model relates to field of current measurement, more particularly, to a kind of tong-type ammeter based on Hall effect.
Background technique
There are many measurement method of electric current, common are current divider, mutual inductor, hall effect sensor, magnetic amplifier type electric current
Comparator, magnetic modulation type current comparator etc..Electrical technology field carry out current measurement when, generally require it is accurate, quickly and
Easily realize the measurement of electric current.In engineering site in application, if necessary to could be by current measuring device after by circuitry cuts
Access measures, time-consuming and laborious and dangerous, does not especially meet phase in the electric current of the electric device of measurement normal operation
Close safety standard.At this point, can be measured under the case where not cutting off circuit using jaw type current measuring device with regard to more convenient
Electric current.
Jaw type current measuring device based on Hall effect is a kind of currently used relatively broad current measurer.It is based on
The current clamp of Hall effect processes an air gap in magnetic core and places Hall element.Utilize the magnetic strength in Hall element measurement air gap
Intensity is answered, according to control mode difference, there is open loop and closed loop two types.Open loop Hall type uses the preferable Hall member of the linearity
Part, hall element output voltage are proportional to tested electric current.Closed loop Hall type uses Zero flux technology, has bucking coil on magnetic core.
When primary has tested electric current to generate magnetic flux in magnetic core, Hall element detects the magnetic induction intensity in magnetic core, passes through negative-feedback
This error voltage is converted into electric current driving bucking coil, offsets the magnetic flux in magnetic core, finally tested electric current and bucking coil produce
Raw magnetic flux is in the same size contrary, and the electric current by measuring bucking coil can converse tested electricity according to turn ratio
Stream.
Utility model content
The utility model provides a kind of new tong-type ammeter based on Hall effect, and the utility model is using improved
Dentation occlusion jaw shapes, can to avoid jaw opening void dimension it is fluid cause entire magnetic circuit reluctance unstable into
And the problem of influencing accuracy correction；Secondly, Hall chip is placed in the centre of two a quarter circle magnetic cores, void dimension is solid
Fixed, trueness error is stablized, and amendment is easy.
In order to solve the above technical problems, the technical solution of the utility model is as follows:
A kind of tong-type ammeter based on Hall effect, including Hall binding clip, sampling resistor and control mould group, wherein
The Hall binding clip measures electric current by Hall element, obtains sample rate current；
Sample rate current is converted sampled voltage by the sampling resistor；
Sampled voltage is carried out signal processing by the control mould group, obtains the numerical value of measurement electric current；
Its connection relationship is as follows:
Hall binding clip is passed through on tested conducting wire, the output end of Hall binding clip and one end of sampling resistor are electrically connected
It connects；
The other end of the sampling resistor is electrically connected with the input terminal of control mould group.
Utility model works process is as follows:
Measured wire is passed through into Hall binding clip, Hall binding clip measures measured wire by Hall element, adopted
Sample signal, sampled signal switch to sampled voltage by sampling resistor, control mould group for sampled voltage and carry out signal processing, obtain by
Survey the numerical value of the electric current of conducting wire.
In a preferred solution, the Hall binding clip includes jaw type probe, and the shape of the jaw type probe is
Annular, and Hall binding clip includes the first movable binding clip and the second movable binding clip, the described first movable binding clip and the second adjustable clamp
Head connection group circularizes binding clip.
In a preferred solution, the vice jaw part of the described first movable binding clip is provided with dentalation, and described the
The vice jaw part of two movable binding clips is provided with dentalation, and the dentation of the dentalation of the first movable binding clip and the second movable binding clip
Structure is opposite, is attached group by engaged mode and circularizes binding clip.
In this preferred scheme, jaw opening uses engaged dentalation, and void dimension at jaw is avoided to float
Suddenly indefinite to cause entire magnetic circuit reluctance unstable, and then influence the problem of measurement accuracy corrects.
In a preferred solution, Hall binding clip further includes Hall element, and the Hall element setting is living first
Dynamic binding clip or the second movable binding clip, and Hall element and the angle of jaw apart are 90 degree.
In this preferred embodiment, Hall chip is placed at the intermediate air gap of two a quarter circles, with jaw position angle
Difference 90 degree, void dimension be completely fixed (will not because jaw it is elastic due to change), the Correction Solution of air gap leakage field bring precision
Certainly it is more easily handled.
In a preferred solution, the Hall binding clip further includes Hall element circuit, Hall power supply circuit and sense
Answer coil, wherein
The Hall element circuit obtains sample rate current for amplifying the inductive signal of Hall element；
The Hall power supply circuit is powered Hall element.
In a preferred solution, the control mould group includes filter circuit, sample circuit, micro-chip processor electricity
Road, radio communication circuit, display screen and micro-chip processor power supply circuit, wherein
Input terminal of the input terminal of the filter circuit as control mould group, the output end and sample circuit of filter circuit
Input terminal electrical connection；
The output end of the sample circuit is electrically connected with the input stage of micro-chip processor circuit；
First output stage of the micro-chip processor circuit is electrically connected with the input stage of display screen；
The wireless communication module stated is electrically connected with micro-chip processor circuit；
The micro-chip processor power supply circuit powers to micro-chip processor.
In this preferred embodiment, module can be passed the data that measurement obtains in the form of wireless digital signal by wireless communication
Computer or mobile phone terminal are passed, wired data transfer bring is avoided to interfere.
In a preferred solution, the micro-chip processor circuit includes STM32L151C8T6, first resistor,
One capacitor, the second capacitor, third capacitor, the 4th capacitor and crystal oscillator, wherein
No. 6 pins, No. 7 pins and No. 8 pins of the STM32L151C8T6 form the first of micro-chip processor circuit
Output stage；
Input stage of No. 11 pins of the STM32L151C8T6 as micro-chip processor circuit；
No. 44 pins of the STM32L151C8T6 are electrically connected with one end of first resistor；
No. 6 pins of the STM32L151C8T6 are electrically connected with one end of first capacitor；
No. 5 pins of the STM32L151C8T6 are electrically connected with one end of the second capacitor；
The other end of the first capacitor is electrically connected with the other end of the second capacitor；
The other end of the first capacitor is grounded；
No. 6 pins of the STM32L151C8T6 are electrically connected with one end of crystal oscillator；
No. 5 pins of the STM32L151C8T6 are electrically connected with the other end of crystal oscillator；
No. 1 pin of the STM32L151C8T6 is electrically connected with No. 24 pins of STM32L151C8T6；
No. 24 pins of the STM32L151C8T6 connect the number transmission of electricity port of micro-chip processor power supply circuit；
No. 24 pins of the STM32L151C8T6 are electrically connected with No. 36 pins of STM32L151C8T6；
No. 36 pins of the STM32L151C8T6 are electrically connected with No. 48 pins of STM32L151C8T6；
No. 9 pins of the STM32L151C8T6 are electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
No. 9 pins of the STM32L151C8T6 are electrically connected with one end of third capacitor；
No. 9 pins of the STM32L151C8T6 are electrically connected with one end of the 4th capacitor；
The other end of the third capacitor is electrically connected with the other end of the 4th capacitor；
The other end of 4th capacitor is grounded；
No. 23 pins of the STM32L151C8T6 are electrically connected with No. 35 pins of STM32L151C8T6；
No. 35 pins of the STM32L151C8T6 are electrically connected with No. 47 pins of STM32L151C8T6；
No. 23 pins of the STM32L151C8T6 are grounded；
No. 8 pins of the STM32L151C8T6 are grounded.
In a preferred solution, the micro-chip processor power supply circuit include AMS1117-3.3, the 5th capacitor,
6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor and high frequency choke coil, wherein
The port Vin of the AMS1117-3.3 is electrically connected with one end of the 5th capacitor；
The port Vin of the AMS1117-3.3 is electrically connected with one end of the 6th capacitor；
One termination power of the 5th capacitor；
The other end of 5th capacitor is electrically connected with the other end of the 6th capacitor；
The other end of 5th capacitor is grounded；
The port Vout of the AMS1117-3.3 is electrically connected with one end of the 7th capacitor；
The port Vout of the AMS1117-3.3 is electrically connected with one end of the 8th capacitor；
The port Vout of the AMS1117-3.3 is electrically connected with one end of the 9th capacitor；
Number transmission of electricity port of the port Vout of the AMS1117-3.3 as micro-chip processor power supply circuit；
The other end of 7th capacitor is electrically connected with the other end of the 8th capacitor；
The other end of 8th capacitor is grounded；
The other end of 8th capacitor is electrically connected with the other end of the 9th capacitor；
The port Vout of the AMS1117-3.3 is electrically connected with one end of high frequency choke coil；
Simulation transmission of electricity port of the other end of the high frequency choke coil as micro-chip processor power supply circuit；
The other end of the high frequency choke coil is electrically connected with one end of the tenth capacitor；
The other end of 9th capacitor is electrically connected with the other end of the tenth capacitor；
The other end of the high frequency choke coil is electrically connected with one end of the 11st capacitor；
The other end of tenth capacitor is electrically connected with the other end of the 11st capacitor；
The other end of tenth capacitor is grounded.
In a preferred solution, the radio communication circuit includes USR-WiFi232 chip, second resistance,
12 capacitors, the 13rd capacitor, wherein
No. 3 pins of the USR-WiFi232 chip are electrically connected with No. 31 pins of STM32L151C8T6；
No. 10 pins of the USR-WiFi232 chip are electrically connected with one end of second resistance；
The other end of the second resistance is electrically connected with the port Vout of AMS1117-3.3；
No. 2 pins of the USR-WiFi232 chip are electrically connected with one end of the 12nd capacitor；
No. 2 pins of the USR-WiFi232 chip are electrically connected with one end of the 13rd capacitor；
The other end of 12nd capacitor is electrically connected with the other end of the 13rd capacitor；
The other end of 13rd capacitor is grounded；
No. 4 pins of the USR-WiFi232 chip are electrically connected with No. 30 pins of STM32L151C8T6.
In a preferred solution, the filter circuit includes the first operational amplifier, second operational amplifier, the
14 capacitors, the 15th capacitor, the 16th capacitor, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance,
8th resistance, the 9th resistance, first diode and the second diode, wherein
Input terminal of the one end of 5th resistance as filter circuit, the other end and the first operation of the 5th resistance are put
The inverting input terminal electrical connection of big device；
One end of 6th resistance is grounded；
The other end of 6th resistance is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 6th resistance is electrically connected with one end of the 7th resistance；
The other end of 7th resistance is electrically connected with the output end of second operational amplifier；
The other end of 7th resistance is electrically connected with the inverting input terminal of second operational amplifier；
The non-inverting input terminal of the second operational amplifier is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The non-inverting input terminal of the second operational amplifier is electrically connected with one end of 3rd resistor；
The other end of the 3rd resistor is electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
The non-inverting input terminal of first operational amplifier is electrically connected with one end of the 15th capacitor；
The other end of 15th capacitor is grounded；
The inverting input terminal of first operational amplifier is electrically connected with one end of the 14th capacitor；
The inverting input terminal of first operational amplifier is electrically connected with one end of the 8th resistance；
The other end of 8th resistance is electrically connected with the other end of the 14th capacitor；
The other end of 14th capacitor is electrically connected with the output end of the first operational amplifier；
The output end of first operational amplifier is electrically connected with one end of the 9th resistance；
The other end of 9th resistance is electrically connected with one end of the 16th capacitor；
The other end of 16th capacitor is grounded；
The other end of 9th resistance is electrically connected with the anode of first diode；
The other end of 9th resistance is electrically connected with the cathode of the second diode；
The cathode of the first diode is electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
The plus earth of second diode；
Output end of the other end of 9th resistance as filter circuit.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
1. can be caused using the jaw shapes of improved dentation occlusion to avoid jaw opening void dimension is fluid
Entire magnetic circuit reluctance is unstable and then the problem of influencing accuracy correction；
2. Hall chip is placed in the centre of two a quarter circle magnetic cores, void dimension is fixed, and trueness error is stablized,
Amendment is easy.
Detailed description of the invention
Fig. 1 is the module map of embodiment.
Fig. 2 is micro-chip processor circuit diagram in embodiment.
Fig. 3 is micro-chip processor power supply circuit in embodiment.
Fig. 4 is the radio communication circuit figure of embodiment.
Fig. 5 is the filter circuit figure of embodiment.
Fig. 6 is the example of parameters figure of embodiment.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The technical solution of the utility model is described further with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of tong-type ammeter based on Hall effect, including Hall binding clip, sampling resistor and control mould
Group, wherein
Hall binding clip measures electric current by Hall element HW302B, obtains sample rate current；
Sample rate current is converted sampled voltage by sampling resistor；
It controls mould group and sampled voltage is subjected to signal processing, obtain the numerical value of measurement electric current；
Its connection relationship is as follows:
Hall binding clip is passed through on tested conducting wire, the output end of Hall binding clip is electrically connected with one end of sampling resistor；
The other end of sampling resistor is electrically connected with the input terminal of control mould group.
Wherein, Hall binding clip includes jaw type probe, and the shape of jaw type probe is annular, and Hall binding clip includes the first activity
Binding clip and the second movable binding clip, the vice jaw part of the first movable binding clip are provided with dentalation, and the vice jaw part of the second movable binding clip is set
It is equipped with dentalation, and the dentalation of the first movable binding clip is opposite with the second movable dentalation of binding clip, by stinging mutually
The mode of conjunction is attached group and circularizes binding clip.
Wherein, Hall binding clip further includes Hall element HW302B, Hall element HW302B setting in the first movable binding clip or
The movable binding clip of person second, and Hall element HW302B and the angle of jaw apart are 90 degree.
Controlling mould group includes filter circuit, sample circuit, micro-chip processor, display screen and wireless communication module, wherein
Input terminal of the input terminal of filter circuit as control mould group, the input of the output end and sample circuit of filter circuit
End electrical connection；
The output end of sample circuit is electrically connected with the input terminal of micro-chip processor；
First output end of micro-chip processor is electrically connected with the input terminal of display screen.
The input terminal of wireless communication module is electrically connected with the second output terminal of micro-chip processor.
Hall binding clip further includes Hall element circuit, Hall power supply circuit and induction coil, wherein
As shown in Fig. 2, micro-chip processor circuit include STM32L151C8T6, first resistor, first capacitor, the second capacitor,
Third capacitor, the 4th capacitor and crystal oscillator, wherein
First output of No. 6 pins, No. 7 pins and No. 8 pin composition micro-chip processor circuits of STM32L151C8T6
Grade；
Input stage of No. 11 pins of STM32L151C8T6 as micro-chip processor circuit；
No. 44 pins of STM32L151C8T6 are electrically connected with one end of first resistor；
No. 6 pins of STM32L151C8T6 are electrically connected with one end of first capacitor；
No. 5 pins of STM32L151C8T6 are electrically connected with one end of the second capacitor；
The other end of first capacitor is electrically connected with the other end of the second capacitor；
The other end of first capacitor is grounded；
No. 6 pins of STM32L151C8T6 are electrically connected with one end of crystal oscillator；
No. 5 pins of STM32L151C8T6 are electrically connected with the other end of crystal oscillator；
No. 1 pin of STM32L151C8T6 is electrically connected with No. 24 pins of STM32L151C8T6；
No. 24 pins of STM32L151C8T6 connect the number transmission of electricity port of micro-chip processor power supply circuit；
No. 24 pins of STM32L151C8T6 are electrically connected with No. 36 pins of STM32L151C8T6；
No. 36 pins of STM32L151C8T6 are electrically connected with No. 48 pins of STM32L151C8T6；
No. 9 pins of STM32L151C8T6 are electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
No. 9 pins of STM32L151C8T6 are electrically connected with one end of third capacitor；
No. 9 pins of STM32L151C8T6 are electrically connected with one end of the 4th capacitor；
The other end of third capacitor is electrically connected with the other end of the 4th capacitor；
The other end of 4th capacitor is grounded；
No. 23 pins of STM32L151C8T6 are electrically connected with No. 35 pins of STM32L151C8T6；
No. 35 pins of STM32L151C8T6 are electrically connected with No. 47 pins of STM32L151C8T6；
No. 23 pins of STM32L151C8T6 are grounded；
No. 8 pins of STM32L151C8T6 are grounded.
As shown in figure 3, micro-chip processor power supply circuit includes AMS1117-3.3, the 5th capacitor, the 6th capacitor, the 7th electricity
Appearance, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor and high frequency choke coil, wherein
The port Vin of AMS1117-3.3 is electrically connected with one end of the 5th capacitor；
The port Vin of AMS1117-3.3 is electrically connected with one end of the 6th capacitor；
One termination power of the 5th capacitor；
The other end of 5th capacitor is electrically connected with the other end of the 6th capacitor；
The other end of 5th capacitor is grounded；
The port Vout of AMS1117-3.3 is electrically connected with one end of the 7th capacitor；
The port Vout of AMS1117-3.3 is electrically connected with one end of the 8th capacitor；
The port Vout of AMS1117-3.3 is electrically connected with one end of the 9th capacitor；
Number transmission of electricity port of the port Vout of AMS1117-3.3 as micro-chip processor power supply circuit；
The other end of 7th capacitor is electrically connected with the other end of the 8th capacitor；
The other end of 8th capacitor is grounded；
The other end of 8th capacitor is electrically connected with the other end of the 9th capacitor；
The port Vout of AMS1117-3.3 is electrically connected with one end of high frequency choke coil；
Simulation transmission of electricity port of the other end of high frequency choke coil as micro-chip processor power supply circuit；
The other end of high frequency choke coil is electrically connected with one end of the tenth capacitor；
The other end of 9th capacitor is electrically connected with the other end of the tenth capacitor；
The other end of high frequency choke coil is electrically connected with one end of the 11st capacitor；
The other end of tenth capacitor is electrically connected with the other end of the 11st capacitor；
The other end of tenth capacitor is grounded.
As shown in figure 4, radio communication circuit includes USR-WiFi232 chip, second resistance, the 12nd capacitor, the 13rd
Capacitor, wherein
No. 3 pins of USR-WiFi232 chip are electrically connected with No. 31 pins of STM32L151C8T6；
No. 10 pins of USR-WiFi232 chip are electrically connected with one end of second resistance；
The other end of second resistance is electrically connected with the port Vout of AMS1117-3.3；
No. 2 pins of USR-WiFi232 chip are electrically connected with one end of the 12nd capacitor；
No. 2 pins of USR-WiFi232 chip are electrically connected with one end of the 13rd capacitor；
The other end of 12nd capacitor is electrically connected with the other end of the 13rd capacitor；
The other end of 13rd capacitor is grounded；
No. 4 pins of USR-WiFi232 chip are electrically connected with No. 30 pins of STM32L151C8T6.
As shown in figure 5, filter circuit includes the first operational amplifier, second operational amplifier, the 14th capacitor, the 15th
Capacitor, the 16th capacitor, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th electricity
Resistance, first diode and the second diode, wherein
Input terminal of the one end of 5th resistance as filter circuit, the other end of the 5th resistance and the first operational amplifier
Inverting input terminal electrical connection；
One end of 6th resistance is grounded；
The other end of 6th resistance is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 6th resistance is electrically connected with one end of the 7th resistance；
The other end of 7th resistance is electrically connected with the output end of second operational amplifier；
The other end of 7th resistance is electrically connected with the inverting input terminal of second operational amplifier；
The non-inverting input terminal of second operational amplifier is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The non-inverting input terminal of second operational amplifier is electrically connected with one end of 3rd resistor；
The other end of 3rd resistor is electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
The non-inverting input terminal of first operational amplifier is electrically connected with one end of the 15th capacitor；
The other end of 15th capacitor is grounded；
The inverting input terminal of first operational amplifier is electrically connected with one end of the 14th capacitor；
The inverting input terminal of first operational amplifier is electrically connected with one end of the 8th resistance；
The other end of 8th resistance is electrically connected with the other end of the 14th capacitor；
The other end of 14th capacitor is electrically connected with the output end of the first operational amplifier；
The output end of first operational amplifier is electrically connected with one end of the 9th resistance；
The other end of 9th resistance is electrically connected with one end of the 16th capacitor；
The other end of 16th capacitor is grounded；
The other end of 9th resistance is electrically connected with the anode of first diode；
The other end of 9th resistance is electrically connected with the cathode of the second diode；
The cathode of first diode is electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
The plus earth of second diode；
Output end of the other end of 9th resistance as filter circuit.
As shown in fig. 6, the critical feature size figure of embodiment, the outer ring radius of Hall binding clip is 49mm, and inner ring radius is
35mm.The outsourcing apposition of Hall binding clip is insulated encapsulated layer, is rubber or Plastic organic insulating material, encapsulated layer thickness 1mm,
The coil wound on magnetic core and magnetic core constitutes outer radius 48mm, and inside radius is 36mm.Magnetic core size is inner ring radius 45mm, inner ring
Radius 39mm, sectional area are then 6mm multiplied by 6mm.Jaw sectional area is 14mm multiplied by 14mm.The lever dimensions length of the present embodiment
For 200mm, width 70mm.There is liquid crystal display in lever side, can show current measurement result, battery capacity, wirelessly connect
Connect the information such as state.
The working principle of the present embodiment section:
In conjunction with Fig. 1, iPRepresent tested electric current, ΦPRepresent the magnetic flux that tested electric current generates in the magnetic core of embodiment, ΦSGeneration
The magnetic flux that electric current in table bucking coil generates in the magnetic core of embodiment.ΦPAnd ΦSIt is contrary, the two offset after difference
Value ΦeHall element both ends in magnetic core air gap generate voltage difference Ve, VeAn electricity is generated by Voltage-current conversion unit
Flow IS, ISFlow into bucking coil, as magnetic flux ΦSExcitation source.Closed loop Hall uses negative-feedback principle, i.e., contrary
ΦPAnd ΦSCloser to equal, then hall sensing voltage difference VeIt is smaller, it is assumed that VeFor positive value, to VeClose to zero, then voltage-to-current
The I that converting unit generatesSThen to increase, such ΦSIt is bigger, closer to ΦP, until ΦPAnd ΦSIt is equal in magnitude, it is contrary；
If VeFor negative value, conversely, to VeClose to zero, then Voltage-current conversion unit generates ISThen to reduce, it is same until ΦP
And ΦSIt is equal in magnitude, it is contrary.VePositive and negative reality by the Voltage Reference direction at Hall element both ends depending on.Work as VeIt is approximate
After being zero, according to electromagnetic coupling principle, electric current I in bucking coilSIt can be converted into according to the number of turns of bucking coil across magnetic core
Tested electric current.ISDigital signal is first converted to by sample circuit, then calculates tested size of current in algorithm analytical unit
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (7)
1. a kind of tong-type ammeter based on Hall effect, which is characterized in that including Hall binding clip, sampling resistor and control mould
Group, wherein
The Hall binding clip measures electric current by Hall element, obtains sample rate current；
Sample rate current is converted sampled voltage by the sampling resistor；
Sampled voltage is carried out signal processing by the control mould group, obtains the numerical value of measurement electric current；
Its connection relationship is as follows:
Hall binding clip is passed through on tested conducting wire, the output end of Hall binding clip is electrically connected with one end of sampling resistor；
The other end of the sampling resistor is electrically connected with the input terminal of control mould group；
The control mould group include filter circuit, sample circuit, micro-chip processor circuit, radio communication circuit, display screen and
Micro-chip processor power supply circuit, wherein
Input terminal of the input terminal of the filter circuit as control mould group, the output end of filter circuit and sample circuit it is defeated
Enter end electrical connection；
The output end of the sample circuit is electrically connected with the input stage of micro-chip processor circuit；
First output stage of the micro-chip processor circuit is electrically connected with the input stage of display screen；
The wireless communication module stated is electrically connected with micro-chip processor circuit；
The micro-chip processor power supply circuit powers to micro-chip processor；
The filter circuit includes the first operational amplifier, second operational amplifier, the 14th capacitor, the 15th capacitor, the
16 capacitors, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, first
Diode and the second diode, wherein
Input terminal of the one end of 5th resistance as filter circuit, the other end and the first operational amplifier of the 5th resistance
Inverting input terminal electrical connection；
One end of 6th resistance is grounded；
The other end of 6th resistance is electrically connected with the non-inverting input terminal of the first operational amplifier；
The other end of 6th resistance is electrically connected with one end of the 7th resistance；
The other end of 7th resistance is electrically connected with the output end of second operational amplifier；
The other end of 7th resistance is electrically connected with the inverting input terminal of second operational amplifier；
The non-inverting input terminal of the second operational amplifier is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The non-inverting input terminal of the second operational amplifier is electrically connected with one end of 3rd resistor；
The other end of the 3rd resistor is electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
The non-inverting input terminal of first operational amplifier is electrically connected with one end of the 15th capacitor；
The other end of 15th capacitor is grounded；
The inverting input terminal of first operational amplifier is electrically connected with one end of the 14th capacitor；
The inverting input terminal of first operational amplifier is electrically connected with one end of the 8th resistance；
The other end of 8th resistance is electrically connected with the other end of the 14th capacitor；
The other end of 14th capacitor is electrically connected with the output end of the first operational amplifier；
The output end of first operational amplifier is electrically connected with one end of the 9th resistance；
The other end of 9th resistance is electrically connected with one end of the 16th capacitor；
The other end of 16th capacitor is grounded；
The other end of 9th resistance is electrically connected with the anode of first diode；
The other end of 9th resistance is electrically connected with the cathode of the second diode；
The cathode of the first diode is electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
The plus earth of second diode；
Output end of the other end of 9th resistance as filter circuit；
The radio communication circuit includes USR-WiFi232 chip, second resistance, the 12nd capacitor, the 13rd capacitor,
In,
No. 3 pins of the USR-WiFi232 chip are electrically connected with No. 31 pins of STM32L151C8T6；
No. 10 pins of the USR-WiFi232 chip are electrically connected with one end of second resistance；
The other end of the second resistance is electrically connected with the port Vout of AMS1117-3.3；
No. 2 pins of the USR-WiFi232 chip are electrically connected with one end of the 12nd capacitor；
No. 2 pins of the USR-WiFi232 chip are electrically connected with one end of the 13rd capacitor；
The other end of 12nd capacitor is electrically connected with the other end of the 13rd capacitor；
The other end of 13rd capacitor is grounded；
No. 4 pins of the USR-WiFi232 chip are electrically connected with No. 30 pins of STM32L151C8T6.
2. tong-type ammeter according to claim 1, which is characterized in that the Hall binding clip includes jaw type probe, institute
The shape for the jaw type probe stated is annular, and Hall binding clip includes the first movable binding clip and the second movable binding clip, described first
Movable binding clip and the second movable binding clip connection group circularize binding clip.
3. tong-type ammeter according to claim 2, which is characterized in that the vice jaw part setting of the movable binding clip of described first
There is dentalation, the vice jaw part of the described second movable binding clip is provided with dentalation, and the dentalation of the first movable binding clip
It is opposite with the second movable dentalation of binding clip, group is attached by engaged mode and circularizes binding clip.
4. tong-type ammeter according to claim 2 or 3, which is characterized in that Hall binding clip further includes Hall element, described
Hall element setting in the first movable binding clip or the second movable binding clip, and Hall element and the angle of jaw apart are 90
Degree.
5. tong-type ammeter according to claim 4, which is characterized in that the Hall binding clip further includes Hall element electricity
Road, Hall power supply circuit and induction coil, wherein
The Hall element circuit obtains sample rate current for amplifying the inductive signal of Hall element；
The Hall power supply circuit is powered Hall element.
6. according to claim 1, tong-type ammeter described in 2,3 or 5, which is characterized in that the micro-chip processor circuit packet
Include STM32L151C8T6, first resistor, first capacitor, the second capacitor, third capacitor, the 4th capacitor and crystal oscillator, wherein
First output of No. 6 pins, No. 7 pins and No. 8 pin composition micro-chip processor circuits of the STM32L151C8T6
Grade；
Input stage of No. 11 pins of the STM32L151C8T6 as micro-chip processor circuit；
No. 44 pins of the STM32L151C8T6 are electrically connected with one end of first resistor；
No. 6 pins of the STM32L151C8T6 are electrically connected with one end of first capacitor；
No. 5 pins of the STM32L151C8T6 are electrically connected with one end of the second capacitor；
The other end of the first capacitor is electrically connected with the other end of the second capacitor；
The other end of the first capacitor is grounded；
No. 6 pins of the STM32L151C8T6 are electrically connected with one end of crystal oscillator；
No. 5 pins of the STM32L151C8T6 are electrically connected with the other end of crystal oscillator；
No. 1 pin of the STM32L151C8T6 is electrically connected with No. 24 pins of STM32L151C8T6；
No. 24 pins of the STM32L151C8T6 connect the number transmission of electricity port of micro-chip processor power supply circuit；
No. 24 pins of the STM32L151C8T6 are electrically connected with No. 36 pins of STM32L151C8T6；
No. 36 pins of the STM32L151C8T6 are electrically connected with No. 48 pins of STM32L151C8T6；
No. 9 pins of the STM32L151C8T6 are electrically connected with the simulation of micro-chip processor power supply circuit transmission of electricity port；
No. 9 pins of the STM32L151C8T6 are electrically connected with one end of third capacitor；
No. 9 pins of the STM32L151C8T6 are electrically connected with one end of the 4th capacitor；
The other end of the third capacitor is electrically connected with the other end of the 4th capacitor；
The other end of 4th capacitor is grounded；
No. 23 pins of the STM32L151C8T6 are electrically connected with No. 35 pins of STM32L151C8T6；
No. 35 pins of the STM32L151C8T6 are electrically connected with No. 47 pins of STM32L151C8T6；
No. 23 pins of the STM32L151C8T6 are grounded；
No. 8 pins of the STM32L151C8T6 are grounded.
7. tong-type ammeter according to claim 6, which is characterized in that the micro-chip processor power supply circuit includes
AMS1117-3.3, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor
And high frequency choke coil, wherein
The port Vin of the AMS1117-3.3 is electrically connected with one end of the 5th capacitor；
The port Vin of the AMS1117-3.3 is electrically connected with one end of the 6th capacitor；
One termination power of the 5th capacitor；
The other end of 5th capacitor is electrically connected with the other end of the 6th capacitor；
The other end of 5th capacitor is grounded；
The port Vout of the AMS1117-3.3 is electrically connected with one end of the 7th capacitor；
The port Vout of the AMS1117-3.3 is electrically connected with one end of the 8th capacitor；
The port Vout of the AMS1117-3.3 is electrically connected with one end of the 9th capacitor；
Number transmission of electricity port of the port Vout of the AMS1117-3.3 as micro-chip processor power supply circuit；
The other end of 7th capacitor is electrically connected with the other end of the 8th capacitor；
The other end of 8th capacitor is grounded；
The other end of 8th capacitor is electrically connected with the other end of the 9th capacitor；
The port Vout of the AMS1117-3.3 is electrically connected with one end of high frequency choke coil；
Simulation transmission of electricity port of the other end of the high frequency choke coil as micro-chip processor power supply circuit；
The other end of the high frequency choke coil is electrically connected with one end of the tenth capacitor；
The other end of 9th capacitor is electrically connected with the other end of the tenth capacitor；
The other end of the high frequency choke coil is electrically connected with one end of the 11st capacitor；
The other end of tenth capacitor is electrically connected with the other end of the 11st capacitor；
The other end of tenth capacitor is grounded.
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| CN2018204007198 | 2018-03-22 | ||
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| CN201820413023.9U Active CN208239511U (en) | 2018-03-22 | 2018-03-26 | A kind of tong-type ammeter based on Hall effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169539A (en) * | 2018-03-22 | 2018-06-15 | 广东电网有限责任公司清远供电局 | A kind of tong-type ammeter based on Hall effect |
| CN112904071A (en) * | 2021-01-11 | 2021-06-04 | 浙江华云信息科技有限公司 | Zero-flux current transformer |
-
2018
- 2018-03-26 CN CN201820417664.1U patent/CN208239512U/en active Active
- 2018-03-26 CN CN201820413023.9U patent/CN208239511U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169539A (en) * | 2018-03-22 | 2018-06-15 | 广东电网有限责任公司清远供电局 | A kind of tong-type ammeter based on Hall effect |
| CN108267621A (en) * | 2018-03-22 | 2018-07-10 | 广东电网有限责任公司清远供电局 | A kind of jaw type current measurer based on Hall element |
| CN112904071A (en) * | 2021-01-11 | 2021-06-04 | 浙江华云信息科技有限公司 | Zero-flux current transformer |
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| CN208239512U (en) | 2018-12-14 |
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