CN207923967U - A kind of jaw type current measurer based on Hall element - Google Patents
A kind of jaw type current measurer based on Hall element Download PDFInfo
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- CN207923967U CN207923967U CN201820412468.5U CN201820412468U CN207923967U CN 207923967 U CN207923967 U CN 207923967U CN 201820412468 U CN201820412468 U CN 201820412468U CN 207923967 U CN207923967 U CN 207923967U
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Abstract
The utility model discloses a kind of jaw type current measurer based on Hall element, including Hall binding clip, sampling resistor and control module, wherein Hall binding clip measures electric current by Hall element, obtains sample rate current；Sampling resistor converts sample rate current to sampled voltage；Sampled voltage is carried out signal processing by control module, obtains the numerical value for measuring electric current；Its connection relation is as follows：Hall binding clip, the output end of Hall binding clip is passed through to be electrically connected with one end of sampling resistor on tested conducting wire；The other end of sampling resistor is electrically connected with the input terminal of control module.The beneficial effects of the utility model：1. using improved dentation occlusion jaw shapes, can to avoid jaw opening void dimension it is fluid cause entire magnetic circuit reluctance unstable so that influence accuracy correction the problem of；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 is corrected and is easy.
Description
Technical field
The utility model is related to field of current measurement, are surveyed more particularly, to a kind of jaw type electric current based on Hall element
Measuring device.
Background technology
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 when measuring the electric current of electric device of normal operation
Close safety standard.At this point, using jaw type current measuring device with regard to more convenient, can be measured under the case where not cutting off circuit
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.The magnetic strength in air gap is measured using Hall element
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 and drives bucking coil, offsets the magnetic flux in magnetic core, finally tested electric current is produced with bucking coil
Raw magnetic flux direction in the same size according to turn ratio by measuring the electric current of bucking coil on the contrary, can converse tested electricity
Stream.
Utility model content
The utility model provides a kind of new jaw type current measurer based on Hall element, and the utility model, which uses, to be changed
Into dentation occlusion jaw shapes, entire magnetic circuit reluctance can be caused unstable to avoid jaw opening void dimension is fluid
The problem of fixed and then influence accuracy correction；Secondly, Hall chip is placed in the centre of two a quarter circle magnetic cores, air gap ruler
Very little fixation, trueness error are stablized, and correct and are easy.
In order to solve the above technical problems, the technical solution of the utility model is as follows：
A kind of jaw type current measurer based on Hall element, including Hall binding clip, sampling resistor and control module,
In,
The Hall binding clip measures electric current by Hall element, obtains sample rate current；
The sampling resistor converts sample rate current to sampled voltage；
Sampled voltage is carried out signal processing by the control module, obtains the numerical value for measuring electric current；
Its connection relation 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 module.
Utility model works process is as follows：
Hall binding clip, Hall binding clip is passed through to measure, adopted to tested conducting wire by Hall element in tested conducting wire
Sample signal, sampled signal switch to sampled voltage by sampling resistor, and sampled voltage is carried out signal processing by control module, obtain by
Survey the numerical value of the electric current of conducting wire.
In a kind of preferred scheme, the Hall binding clip includes the first movable binding clip and the second movable binding clip, and institute
The vice jaw part for the first movable binding clip stated is provided with dentalation, and the vice jaw part of the described second movable binding clip is provided with dentation knot
Structure, and the dentalation of the first movable binding clip is opposite with the second activity dentalation of binding clip, by engaged mode into
Row connection group circularizes binding clip.
In a kind of preferred scheme, the Hall binding clip further includes Hall element circuit, Hall power supply circuit and sense
Answer coil, wherein
The Hall element circuit is used to the inductive signal of Hall element being amplified, and obtains sample rate current, wherein
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；
The Hall power supply circuit is powered Hall element.
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.Hall chip is placed in two four points
One of at circular intermediate air gap, differ 90 degree with jaw position angle, void dimension be completely fixed (will not be because of jaw it is elastic
And change), the correction solution for the precision that air gap leakage field is brought is more easily handled.
In a kind of preferred scheme, the control module 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 module, 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 will measure obtained data and be passed in the form of wireless digital signal by radio communication
Computer or mobile phone terminal are passed, the interference for avoiding wired data transfer from bringing.
In a kind of preferred scheme, the micro-chip processor circuit includes STM32L151C8T6, first resistor,
One capacitance, the second capacitance, third capacitance, the 4th capacitance and crystal oscillator, wherein
No. 6 pins of the STM32L151C8T6, the first of No. 7 pins and No. 8 pin composition micro-chip processor circuits
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 the first capacitance；
No. 5 pins of the STM32L151C8T6 are electrically connected with one end of the second capacitance；
The other end of first capacitance is electrically connected with the other end of the second capacitance；
The other end of first capacitance 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 capacitance；
No. 9 pins of the STM32L151C8T6 are electrically connected with one end of the 4th capacitance；
The other end of the third capacitance is electrically connected with the other end of the 4th capacitance；
The other end of 4th capacitance 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 kind of preferred scheme, the micro-chip processor power supply circuit include AMS1117-3.3, the 5th capacitance,
6th capacitance, the 7th capacitance, the 8th capacitance, the 9th capacitance, the tenth capacitance, the 11st capacitance and high frequency choke coil, wherein
The ports Vin of the AMS1117-3.3 are electrically connected with one end of the 5th capacitance；
The ports Vin of the AMS1117-3.3 are electrically connected with one end of the 6th capacitance；
One termination power of the 5th capacitance；
The other end of 5th capacitance is electrically connected with the other end of the 6th capacitance；
The other end of 5th capacitance is grounded；
The ports Vout of the AMS1117-3.3 are electrically connected with one end of the 7th capacitance；
The ports Vout of the AMS1117-3.3 are electrically connected with one end of the 8th capacitance；
The ports Vout of the AMS1117-3.3 are electrically connected with one end of the 9th capacitance；
Number transmission of electricity port of the ports Vout of the AMS1117-3.3 as micro-chip processor power supply circuit；
The other end of 7th capacitance is electrically connected with the other end of the 8th capacitance；
The other end of 8th capacitance is grounded；
The other end of 8th capacitance is electrically connected with the other end of the 9th capacitance；
The ports Vout of the AMS1117-3.3 are 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 capacitance；
The other end of 9th capacitance is electrically connected with the other end of the tenth capacitance；
The other end of the high frequency choke coil is electrically connected with one end of the 11st capacitance；
The other end of tenth capacitance is electrically connected with the other end of the 11st capacitance；
The other end of tenth capacitance is grounded.
In a kind of preferred scheme, the radio communication circuit includes USR-WiFi232 chips, second resistance,
12 capacitances, the 13rd capacitance, wherein
No. 3 pins of the USR-WiFi232 chips are electrically connected with No. 31 pins of STM32L151C8T6；
No. 10 pins of the USR-WiFi232 chips are electrically connected with one end of second resistance；
The other end of the second resistance is electrically connected with the ports Vout of AMS1117-3.3；
No. 2 pins of the USR-WiFi232 chips are electrically connected with one end of the 12nd capacitance；
No. 2 pins of the USR-WiFi232 chips are electrically connected with one end of the 13rd capacitance；
The other end of 12nd capacitance is electrically connected with the other end of the 13rd capacitance；
The other end of 13rd capacitance is grounded；
No. 4 pins of the USR-WiFi232 chips are electrically connected with No. 30 pins of STM32L151C8T6.
In a kind of preferred scheme, the filter circuit includes the first operational amplifier, second operational amplifier, the
14 capacitances, the 15th capacitance, the 16th capacitance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance,
8th resistance, the 9th resistance, the 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 electrical connection of big device；
One end of 6th resistance is grounded；
The other end of 6th resistance is electrically connected with the in-phase input end 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 of second operational amplifier；
The in-phase input end of the second operational amplifier is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The in-phase input end 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 in-phase input end of first operational amplifier is electrically connected with one end of the 15th capacitance；
The other end of 15th capacitance is grounded；
The inverting input of first operational amplifier is electrically connected with one end of the 14th capacitance；
The inverting input 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 capacitance；
The other end of 14th capacitance 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 capacitance；
The other end of 16th capacitance is grounded；
The other end of 9th resistance is electrically connected with the anode of the 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.
In a kind of preferred scheme, the Hall element circuit includes opa551 chips, the tenth resistance, the 11st electricity
Resistance, twelfth resistor, thirteenth resistor, the 17th capacitance, the 18th capacitance, the 19th capacitance, the 20th capacitance, the 21st
Capacitance, the 22nd capacitance, first interface and second interface, wherein
The first interface includes four ports, and the first interface is for connecting Hall element；
The second interface includes two ports, and the second interface is for connecting induction coil；
Its connection relation is as follows：
No. 2 pins of the opa551 are electrically connected with one end of the 17th capacitance；
No. 2 pins of the opa551 are electrically connected with one end of twelfth resistor；
The other end of 17th capacitance is electrically connected with No. 6 pins of opa551；
The other end of the twelfth resistor is electrically connected with opa551 No. 6 pins；
No. 2 pins of the opa551 are electrically connected with one end of the tenth resistance；
The other end of tenth resistance is electrically connected with the 4th port of first interface；
The third port of the first interface is electrically connected with the transmission of electricity interface of Hall power supply circuit；
No. 3 pins of the opa551 are electrically connected with one end of eleventh resistor；
No. 3 pins of the opa551 are electrically connected with one end of the 18th capacitance；
No. 3 pins of the opa551 are electrically connected with one end of thirteenth resistor；
The other end of 18th capacitance is grounded；
The other end of the thirteenth resistor is grounded；
The other end of the eleventh resistor is electrically connected with the second port of first interface；
The first port of the first interface is grounded；
No. 4 pins of the opa551 connect power supply；
No. 4 pins of the opa551 are electrically connected with one end of the 19th capacitance；
No. 4 pins of the opa551 are electrically connected with one end of the 20th capacitance；
The other end of 19th capacitance is grounded；
The other end of 20th capacitance is grounded；
No. 7 pins of the opa551 connect power supply；
No. 7 pins of the opa551 are electrically connected with one end of the 21st capacitance；
No. 7 pins of the opa551 are electrically connected with one end of the 22nd capacitance；
The other end of 21st capacitance is grounded；
The other end of 22nd capacitance is grounded；
No. 6 pins of the opa551 are electrically connected with the first port of second interface；
The second port of the second interface is electrically connected with one end of sampling resistor；
The other end of the sampling resistor is grounded.
In a kind of preferred scheme, the Hall power supply circuit includes LM317 chips, the 23rd capacitance, second
14 capacitances, the 14th resistance and the 15th resistance, connection relation are as follows：
No. 3 pins of the LM317 chips connect power supply, one end of No. 3 pins and the 23rd capacitance of LM317 chips
Electrical connection；
The other end of 23rd capacitance is grounded；
No. 1 pin of the LM317 chips is electrically connected with one end of the 14th resistance；
No. 1 pin of the LM317 chips is electrically connected with one end of the 15th resistance；
The other end of 14th resistance is grounded；
The other end of 15th resistance is grounded with No. 2 pins of LM317 chips；
Transmission of electricity interface of No. 2 pins of the LM317 chips as Hall power supply circuit, No. 2 pins of LM317 chips
It is electrically connected with one end of the 24th capacitance；
The other end of 24th capacitance is grounded.
Compared with prior art, the advantageous effect of technical solutions of the utility model is：
1. using the jaw shapes of improved dentation occlusion, can cause 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,
It corrects and is easy.
Description of the drawings
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 Hall binding clip and sampling resistor circuit diagram in embodiment.
Fig. 7 is the circuit diagram of Hall chip in embodiment.
Fig. 8 is the example of parameters figure of embodiment.
Specific implementation mode
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to more preferably illustrate that the present embodiment, the certain components of attached drawing have omission, zoom in or out, actual product is not represented
Size；
To those skilled in the art, it is to be appreciated 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 jaw type current measurer based on Hall element, including Hall binding clip, sampling resistor and control
Molding group, wherein
Hall binding clip measures electric current by Hall element HW302B, obtains sample rate current；
Sampling resistor converts sample rate current to sampled voltage；
Sampled voltage is carried out signal processing by control module, obtains the numerical value for measuring electric current；
Its connection relation is as follows：
Hall binding clip, the output end of Hall binding clip is passed through to be electrically connected with one end of sampling resistor on tested conducting wire；
The other end of sampling resistor is electrically connected with the input terminal of control module.
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
The vice jaw part of binding clip and the second movable binding clip, the first movable binding clip is 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 settings 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.
It includes filter circuit, sample circuit, micro-chip processor, display screen and wireless communication module to control module, wherein
Input terminal of the input terminal of filter circuit as control module, 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, the first capacitance, the second capacitance,
Third capacitance, the 4th capacitance 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 the first capacitance；
No. 5 pins of STM32L151C8T6 are electrically connected with one end of the second capacitance；
The other end of first capacitance is electrically connected with the other end of the second capacitance；
The other end of first capacitance 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 capacitance；
No. 9 pins of STM32L151C8T6 are electrically connected with one end of the 4th capacitance；
The other end of third capacitance is electrically connected with the other end of the 4th capacitance；
The other end of 4th capacitance 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 capacitance, the 6th capacitance, the 7th electricity
Appearance, the 8th capacitance, the 9th capacitance, the tenth capacitance, the 11st capacitance and high frequency choke coil, wherein
The ports Vin of AMS1117-3.3 are electrically connected with one end of the 5th capacitance；
The ports Vin of AMS1117-3.3 are electrically connected with one end of the 6th capacitance；
One termination power of the 5th capacitance；
The other end of 5th capacitance is electrically connected with the other end of the 6th capacitance；
The other end of 5th capacitance is grounded；
The ports Vout of AMS1117-3.3 are electrically connected with one end of the 7th capacitance；
The ports Vout of AMS1117-3.3 are electrically connected with one end of the 8th capacitance；
The ports Vout of AMS1117-3.3 are electrically connected with one end of the 9th capacitance；
Number transmission of electricity port of the ports Vout of AMS1117-3.3 as micro-chip processor power supply circuit；
The other end of 7th capacitance is electrically connected with the other end of the 8th capacitance；
The other end of 8th capacitance is grounded；
The other end of 8th capacitance is electrically connected with the other end of the 9th capacitance；
The ports Vout of AMS1117-3.3 are 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 capacitance；
The other end of 9th capacitance is electrically connected with the other end of the tenth capacitance；
The other end of high frequency choke coil is electrically connected with one end of the 11st capacitance；
The other end of tenth capacitance is electrically connected with the other end of the 11st capacitance；
The other end of tenth capacitance is grounded.
As shown in figure 4, radio communication circuit includes USR-WiFi232 chips, second resistance, the 12nd capacitance, the 13rd
Capacitance, wherein
No. 3 pins of USR-WiFi232 chips are electrically connected with No. 31 pins of STM32L151C8T6；
No. 10 pins of USR-WiFi232 chips are electrically connected with one end of second resistance；
The other end of second resistance is electrically connected with the ports Vout of AMS1117-3.3；
No. 2 pins of USR-WiFi232 chips are electrically connected with one end of the 12nd capacitance；
No. 2 pins of USR-WiFi232 chips are electrically connected with one end of the 13rd capacitance；
The other end of 12nd capacitance is electrically connected with the other end of the 13rd capacitance；
The other end of 13rd capacitance is grounded；
No. 4 pins of USR-WiFi232 chips 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 capacitance, the 15th
Capacitance, the 16th capacitance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th electricity
Resistance, the 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 is electrically connected；
One end of 6th resistance is grounded；
The other end of 6th resistance is electrically connected with the in-phase input end 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 of second operational amplifier；
The in-phase input end of second operational amplifier is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The in-phase input end 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 in-phase input end of first operational amplifier is electrically connected with one end of the 15th capacitance；
The other end of 15th capacitance is grounded；
The inverting input of first operational amplifier is electrically connected with one end of the 14th capacitance；
The inverting input 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 capacitance；
The other end of 14th capacitance 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 capacitance；
The other end of 16th capacitance is grounded；
The other end of 9th resistance is electrically connected with the anode of the 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, Hall element circuit include opa551 chips, the tenth resistance, eleventh resistor, twelfth resistor,
Thirteenth resistor, the 17th capacitance, the 18th capacitance, the 19th capacitance, the 20th capacitance, the 21st capacitance, the 22nd
Capacitance, first interface and second interface, wherein
First interface includes four ports, and the first interface is for connecting Hall element；
Second interface includes two ports, and the second interface is for connecting induction coil；
Its connection relation is as follows：
No. 2 pins of opa551 are electrically connected with one end of the 17th capacitance；
No. 2 pins of opa551 are electrically connected with one end of twelfth resistor；
The other end of 17th capacitance is electrically connected with No. 6 pins of opa551；
The other end of twelfth resistor is electrically connected with opa551 No. 6 pins；
No. 2 pins of opa551 are electrically connected with one end of the tenth resistance；
The other end of tenth resistance is electrically connected with the 4th port of first interface；
The third port of first interface is electrically connected with the transmission of electricity interface of Hall power supply circuit；
No. 3 pins of opa551 are electrically connected with one end of eleventh resistor；
No. 3 pins of opa551 are electrically connected with one end of the 18th capacitance；
No. 3 pins of opa551 are electrically connected with one end of thirteenth resistor；
The other end of 18th capacitance is grounded；
The other end of thirteenth resistor is grounded；
The other end of eleventh resistor is electrically connected with the second port of first interface；
The first port of first interface is grounded；
No. 4 pins of opa551 connect power supply；
No. 4 pins of opa551 are electrically connected with one end of the 19th capacitance；
No. 4 pins of opa551 are electrically connected with one end of the 20th capacitance；
The other end of 19th capacitance is grounded；
The other end of 20th capacitance is grounded；
No. 7 pins of opa551 connect power supply；
No. 7 pins of opa551 are electrically connected with one end of the 21st capacitance；
No. 7 pins of opa551 are electrically connected with one end of the 22nd capacitance；
The other end of 21st capacitance is grounded；
The other end of 22nd capacitance is grounded；
No. 6 pins of opa551 are electrically connected with the first port of second interface；
The second port of second interface is electrically connected with one end of sampling resistor；
The other end of sampling resistor is grounded.
As shown in fig. 7, Hall power supply circuit includes LM317 chips, the 23rd capacitance, the 24th capacitance, the 14th
Resistance and the 15th resistance, connection relation are as follows：
No. 3 pins of LM317 chips connect power supply, and one end of No. 3 pins and the 23rd capacitance of LM317 chips is electrically connected
It connects；
The other end of 23rd capacitance is grounded；
No. 1 pin of LM317 chips is electrically connected with one end of the 14th resistance；
No. 1 pin of LM317 chips is electrically connected with one end of the 15th resistance；
The other end of 14th resistance is grounded；
The other end of 15th resistance is grounded with No. 2 pins of LM317 chips；
Transmission of electricity interface of No. 2 pins of LM317 chips as Hall power supply circuit, No. 2 pins of LM317 chips and second
One end of 14 capacitances is electrically connected；
The other end of 24th capacitance is grounded.
As shown in figure 8, the critical feature size figure of embodiment, the outer shroud radius of Hall binding clip is 49mm, and inner ring radius is
35mm.The outsourcing apposition insulation encapsulated layer of Hall binding clip, is rubber or Plastic organic insulating material, encapsulates 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 that 6mm is multiplied by 6mm.Jaw sectional area is that 14mm is 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 operation principle of the present embodiment section：
In conjunction with Fig. 1, iPIt represents and is tested electric current, ΦPIt represents and is tested the magnetic flux that 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 ΦSDirection on the 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. direction is opposite
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 ΦSEqual in magnitude, direction is opposite；
If VeFor negative value, conversely, to VeClose to zero, then Voltage-current conversion unit generates ISThen to reduce, it is same until ΦP
And ΦSEqual in magnitude, direction is opposite.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 across magnetic core according to the number of turns of bucking coil
Tested electric current.ISDigital signal is first converted to by sample circuit, then calculates tested size of current in Algorithm Analysis 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, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model.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
It is exhaustive.All any modification, equivalent and improvement made within the spirit and principle of the present invention etc., should be included in
Within the protection domain of the utility model claims.
Claims (10)
1. a kind of jaw type current measurer based on Hall element, which is characterized in that including Hall binding clip, sampling resistor and control
Module, wherein
The Hall binding clip measures electric current by Hall element, obtains sample rate current；
The sampling resistor converts sample rate current to sampled voltage；
Sampled voltage is carried out signal processing by the control module, obtains the numerical value for measuring electric current；
Its connection relation is as follows：
Hall binding clip, the output end of Hall binding clip is passed through to be electrically connected with one end of sampling resistor on tested conducting wire；
The other end of the sampling resistor is electrically connected with the input terminal of control module.
2. jaw type current measurer according to claim 1, which is characterized in that the Hall binding clip includes the first activity
Binding clip and the second movable binding clip, and the vice jaw part of the first movable binding clip is provided with dentalation, the described second activity
The vice jaw part of binding clip is provided with dentalation, and the dentalation phase of the dentalation of the first movable binding clip and the second movable binding clip
It is right, group is attached by engaged mode and circularizes binding clip.
3. jaw type current measurer according to claim 2, which is characterized in that the Hall binding clip further includes Hall member
Part circuit, Hall power supply circuit and induction coil, wherein
The Hall element circuit obtains sample rate current for the inductive signal of Hall element to be amplified, it is therein suddenly
Your element is arranged in the first movable binding clip or the second movable binding clip, and Hall element and the angle of jaw apart are 90 degree；
The Hall power supply circuit is powered Hall element.
4. jaw type current measurer according to claim 3, which is characterized in that the control module includes filtered electrical
Road, 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 module, 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.
5. jaw type current measurer according to claim 4, which is characterized in that the micro-chip processor circuit includes
STM32L151C8T6, first resistor, the first capacitance, the second capacitance, third capacitance, the 4th capacitance 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 the first capacitance；
No. 5 pins of the STM32L151C8T6 are electrically connected with one end of the second capacitance；
The other end of first capacitance is electrically connected with the other end of the second capacitance；
The other end of first capacitance 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 capacitance；
No. 9 pins of the STM32L151C8T6 are electrically connected with one end of the 4th capacitance；
The other end of the third capacitance is electrically connected with the other end of the 4th capacitance；
The other end of 4th capacitance 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.
6. jaw type current measurer according to claim 5, which is characterized in that the micro-chip processor power supply circuit packet
Include AMS1117-3.3, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, the 9th capacitance, the tenth capacitance, the 11st electricity
Appearance and high frequency choke coil, wherein
The ports Vin of the AMS1117-3.3 are electrically connected with one end of the 5th capacitance；
The ports Vin of the AMS1117-3.3 are electrically connected with one end of the 6th capacitance；
One termination power of the 5th capacitance；
The other end of 5th capacitance is electrically connected with the other end of the 6th capacitance；
The other end of 5th capacitance is grounded；
The ports Vout of the AMS1117-3.3 are electrically connected with one end of the 7th capacitance；
The ports Vout of the AMS1117-3.3 are electrically connected with one end of the 8th capacitance；
The ports Vout of the AMS1117-3.3 are electrically connected with one end of the 9th capacitance；
Number transmission of electricity port of the ports Vout of the AMS1117-3.3 as micro-chip processor power supply circuit；
The other end of 7th capacitance is electrically connected with the other end of the 8th capacitance；
The other end of 8th capacitance is grounded；
The other end of 8th capacitance is electrically connected with the other end of the 9th capacitance；
The ports Vout of the AMS1117-3.3 are 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 capacitance；
The other end of 9th capacitance is electrically connected with the other end of the tenth capacitance；
The other end of the high frequency choke coil is electrically connected with one end of the 11st capacitance；
The other end of tenth capacitance is electrically connected with the other end of the 11st capacitance；
The other end of tenth capacitance is grounded.
7. jaw type current measurer according to claim 6, which is characterized in that the radio communication circuit includes USR-
WiFi232 chips, second resistance, the 12nd capacitance, the 13rd capacitance, wherein
No. 3 pins of the USR-WiFi232 chips are electrically connected with No. 31 pins of STM32L151C8T6；
No. 10 pins of the USR-WiFi232 chips are electrically connected with one end of second resistance；
The other end of the second resistance is electrically connected with the ports Vout of AMS1117-3.3；
No. 2 pins of the USR-WiFi232 chips are electrically connected with one end of the 12nd capacitance；
No. 2 pins of the USR-WiFi232 chips are electrically connected with one end of the 13rd capacitance；
The other end of 12nd capacitance is electrically connected with the other end of the 13rd capacitance；
The other end of 13rd capacitance is grounded；
No. 4 pins of the USR-WiFi232 chips are electrically connected with No. 30 pins of STM32L151C8T6.
8. jaw type current measurer according to claim 7, which is characterized in that the filter circuit includes the first operation
Amplifier, second operational amplifier, the 14th capacitance, the 15th capacitance, the 16th capacitance, 3rd resistor, the 4th resistance, the 5th
Resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 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 electrical connection；
One end of 6th resistance is grounded；
The other end of 6th resistance is electrically connected with the in-phase input end 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 of second operational amplifier；
The in-phase input end of the second operational amplifier is electrically connected with one end of the 4th resistance；
The other end of 4th resistance is grounded；
The in-phase input end 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 in-phase input end of first operational amplifier is electrically connected with one end of the 15th capacitance；
The other end of 15th capacitance is grounded；
The inverting input of first operational amplifier is electrically connected with one end of the 14th capacitance；
The inverting input 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 capacitance；
The other end of 14th capacitance 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 capacitance；
The other end of 16th capacitance is grounded；
The other end of 9th resistance is electrically connected with the anode of the 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.
9. the jaw type current measurer according to any claim in claim 3 to 8, which is characterized in that it is described suddenly
Your element circuitry includes opa551 chips, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the 17th electricity
Appearance, the 18th capacitance, the 19th capacitance, the 20th capacitance, the 21st capacitance, the 22nd capacitance, first interface and second
Interface, wherein
The first interface includes four ports, and the first interface is for connecting Hall element；
The second interface includes two ports, and the second interface is for connecting induction coil；
Its connection relation is as follows：
No. 2 pins of the opa551 are electrically connected with one end of the 17th capacitance；
No. 2 pins of the opa551 are electrically connected with one end of twelfth resistor；
The other end of 17th capacitance is electrically connected with No. 6 pins of opa551；
The other end of the twelfth resistor is electrically connected with opa551 No. 6 pins；
No. 2 pins of the opa551 are electrically connected with one end of the tenth resistance；
The other end of tenth resistance is electrically connected with the 4th port of first interface；
The third port of the first interface is electrically connected with the transmission of electricity interface of Hall power supply circuit；
No. 3 pins of the opa551 are electrically connected with one end of eleventh resistor；
No. 3 pins of the opa551 are electrically connected with one end of the 18th capacitance；
No. 3 pins of the opa551 are electrically connected with one end of thirteenth resistor；
The other end of 18th capacitance is grounded；
The other end of the thirteenth resistor is grounded；
The other end of the eleventh resistor is electrically connected with the second port of first interface；
The first port of the first interface is grounded；
No. 4 pins of the opa551 connect power supply；
No. 4 pins of the opa551 are electrically connected with one end of the 19th capacitance；
No. 4 pins of the opa551 are electrically connected with one end of the 20th capacitance；
The other end of 19th capacitance is grounded；
The other end of 20th capacitance is grounded；
No. 7 pins of the opa551 connect power supply；
No. 7 pins of the opa551 are electrically connected with one end of the 21st capacitance；
No. 7 pins of the opa551 are electrically connected with one end of the 22nd capacitance；
The other end of 21st capacitance is grounded；
The other end of 22nd capacitance is grounded；
No. 6 pins of the opa551 are electrically connected with the first port of second interface；
The second port of the second interface is electrically connected with one end of sampling resistor；
The other end of the sampling resistor is grounded.
10. jaw type current measurer according to claim 9, which is characterized in that the Hall power supply circuit includes
LM317 chips, the 23rd capacitance, the 24th capacitance, the 14th resistance and the 15th resistance, connection relation are as follows：
No. 3 pins of the LM317 chips connect power supply, and one end of No. 3 pins and the 23rd capacitance of LM317 chips is electrically connected
It connects；
The other end of 23rd capacitance is grounded；
No. 1 pin of the LM317 chips is electrically connected with one end of the 14th resistance；
No. 1 pin of the LM317 chips is electrically connected with one end of the 15th resistance；
The other end of 14th resistance is grounded；
The other end of 15th resistance is grounded with No. 2 pins of LM317 chips；
Transmission of electricity interface of No. 2 pins of the LM317 chips as Hall power supply circuit, No. 2 pins of LM317 chips and
One end of 24 capacitances is electrically connected；
The other end of 24th capacitance is grounded.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820400632 | 2018-03-22 | ||
| CN2018204006320 | 2018-03-22 |
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| CN207923967U true CN207923967U (en) | 2018-09-28 |
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| CN201820412468.5U Active CN207923967U (en) | 2018-03-22 | 2018-03-26 | A kind of jaw type current measurer based on Hall element |
| CN201820417771.4U Active CN208239519U (en) | 2018-03-22 | 2018-03-26 | A kind of jaw type Hall effect current table |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820417771.4U Active CN208239519U (en) | 2018-03-22 | 2018-03-26 | A kind of jaw type Hall effect current table |
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