CN106771487A - The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current - Google Patents

The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current Download PDF

Info

Publication number
CN106771487A
CN106771487A CN201611196544.5A CN201611196544A CN106771487A CN 106771487 A CN106771487 A CN 106771487A CN 201611196544 A CN201611196544 A CN 201611196544A CN 106771487 A CN106771487 A CN 106771487A
Authority
CN
China
Prior art keywords
resistance
voltage
measuring instrument
voltage measurement
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611196544.5A
Other languages
Chinese (zh)
Inventor
王海军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Chuanying Information Technology Co Ltd
Original Assignee
Shanghai Chuanying Information Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Chuanying Information Technology Co Ltd filed Critical Shanghai Chuanying Information Technology Co Ltd
Priority to CN201611196544.5A priority Critical patent/CN106771487A/en
Publication of CN106771487A publication Critical patent/CN106771487A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only

Abstract

A kind of measuring instrument, a kind of method of measurement electric current and a kind of method for measuring mobile phone charging current, the measuring instrument include:Voltage measurement passage, with connection end;Resistance, the resistance is connected by with the connection end, and realization is in parallel with the voltage measurement passage, and the resistance is used to be connected serially in current path to be measured.Above-mentioned measuring instrument can measure electric current by a resistance in parallel with voltage measurement passage, reduce impedance, and effectively using the voltage measurement passage of measuring instrument.

Description

The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current
Technical field
The present invention relates to measuring instrument field, more particularly to a kind of measuring instrument, a kind of method and one kind of measurement electric current The method for measuring mobile phone charging current.
Background technology
Now, up to 2A to 5A, even more high is in this for the current value that mobile phone charges, and the electric current of measuring instrument on the market The range of path cannot be matched with current values now, and the number of current path is less, plurality of mobile phones of if desired sampling Electric current when need multiple modules, voltage and current is measured using voltage gear and current gear respectively, then cannot meet demand, example Such as, the number of the current path of relatively conventional a measuring instrument is 2, and range is:10nA to 1A.
When directly the mA ranks low current of rate respectively is collected using High Precision Multimeter, internal resistance conference has a strong impact on hand The precision of machine charging curve, causes low production efficiency, and current curve data can not be carried out multi-channel high-accuracy simultaneously Collection and record.
So needing to provide a kind of measuring instrument, impedance can be reduced, lift the precision of the current value of measurement.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of measuring instrument so that measuring instrument can lift measurement Current value precision.
In order to solve the above problems, the invention provides a kind of measuring instrument, including:A kind of measuring instrument, including:Electricity Resistance, the resistance is used to be connected serially in current path to be measured;Voltage measurement passage, with connection end, the connection end with electricity The connection of resistance two ends, makes voltage measurement passage in parallel with a resistor, and the voltage measurement passage is used to measure resistance both end voltage.
Optionally, also include:Data processing module, is connected with the voltage measurement passage, for by voltage measurement passage Measured magnitude of voltage is converted into current value.
Optionally, the resistance value scope of the resistance is 5 milliohms to 100 milliohms.
Optionally, the length of connecting line is less than 5 centimetres between the resistance and connection end.
Optionally, also include:Display module, is connected, with the data processing module for showing current information.
The present invention also provides a kind of method for measuring electric current, including:A measuring instrument is provided, the measuring instrument includes: Resistance, the resistance is used to being connected serially in current path to be measured, voltage measurement passage, with connection end, the connection end with Resistance two ends connect, and make voltage measurement passage in parallel with a resistor, and the voltage measurement passage is used to measure resistance both end voltage;Will In the resistant series to current path to be measured;Obtain the magnitude of voltage at the resistance two ends measured by voltage measurement passage;According to Current value in the resistance value calculating current path of the magnitude of voltage and the resistance.
Optionally, the resistance value scope of the resistance is 5 milliohms to 100 milliohms.
Optionally, the length of connecting line is less than 5 centimetres between the resistance and connection end.
The present invention also provides a kind of method for measuring mobile phone charging current, including:One mobile phone, charger are provided and are surveyed Measuring appratus, the measuring instrument includes:Resistance, the resistance is for being connected serially in current path to be measured, voltage measurement passage, With connection end, the connection end is connected with resistance two ends, makes voltage measurement passage in parallel with a resistor, the voltage measurement passage For measuring resistance both end voltage;Mobile phone is connected to charger, and charger is connected to power supply;By the resistant series extremely In charging current path between mobile phone and charger;Obtain the voltage at the resistance two ends measured by voltage measurement passage Value;Resistance value according to the magnitude of voltage and the resistance calculates the current value in the charging current path.
Optionally, the resistance value scope of the resistance is 5 milliohms to 100 milliohms.
Measuring instrument of the invention, resistance is in parallel with voltage measurement passage, and the resistance is used for and current path to be measured Series connection, the voltage measurement passage is used to measure the magnitude of voltage at the resistance two ends, thus by measured voltage with it is described The resistance value of resistance converses the current value of the current path to be measured.This measuring instrument is not increasing EM equipment module and electricity In the case of circulation road, effectively using the voltage measurement passage of measuring instrument, reduction impedance, the effect of motor current measurement range are reached Really so that measured current value is more accurate, and has saved production cost.
Further, the resistance is short with the connection line length of the voltage measurement passage, reduces the resistance of connecting line Value so that the current value degree of accuracy of measurement is higher.
The method of measurement electric current of the invention, will by providing a kind of resistance the measuring instrument in parallel with voltage measurement passage Measuring instrument is connected serially in current path to be measured, then the resistance two ends as measured by voltage measurement passage magnitude of voltage, with And the resistance value of resistance, obtain the current value of the current path.The method of this measurement electric current is effectively using measuring instrument Voltage measurement passage, reaches reduction impedance, the effect of motor current measurement range so that measured current value is more accurate.
Further, the resistance is short with the connecting length of voltage measurement passage, reduces resistance value so that the electricity of measurement The flow valuve degree of accuracy is higher.
The method of measurement mobile phone charging current of the invention, is connected by by mobile phone with charger, and charger is connected to Power supply, and the resistance in measuring instrument is connected serially in the charging current path between mobile phone and charger such that it is able to it is logical The magnitude of voltage at the resistance two ends measured by over-voltage measurement passage, and resistance resistance value, obtain the charging current path Current value.The method of the mobile phone charging current effectively using the voltage measurement passage of measuring instrument, reaches reduction impedance, carries Rise the effect of current measuring range so that measured current value is more accurate.
Brief description of the drawings
Fig. 1 is the schematic diagram of the measuring instrument of the embodiment of the invention;
Fig. 2 is the module map of the measuring instrument of the embodiment of the invention;
Fig. 3 is the flow chart of the method for the measurement electric current of the embodiment of the invention;
Fig. 4 is the measuring instrument of the embodiment of the invention and the schematic diagram of current path;
Fig. 5 is the flow chart of the method for the measurement mobile phone charging current of the embodiment of the invention.
Specific embodiment
The specific embodiment of the measuring instrument for providing the present invention below in conjunction with the accompanying drawings elaborates.
Fig. 1 is refer to, is the schematic diagram of the measuring instrument of the embodiment of the invention.
The measuring instrument includes:A kind of measuring instrument, including:Resistance 102, the resistance 102 is to be measured for being connected serially to Current path in;Voltage measurement passage 101, with connection end, the connection end is connected with the two ends of resistance 102, surveys voltage Amount passage 101 is in parallel with resistance 102, and the voltage measurement passage 101 is used to measure the both end voltage of resistance 102.
The measuring instrument has multiple voltage measurement passages 101, and multiple voltage measurement passages 101 can be changed simultaneously Dress, will voltage measurement passage 101 it is in parallel with resistance 102, this method can simultaneously measure the electric current to individual current path, carry The utilization ratio of voltage measurement passage 101 is risen.
The resistance 102 is high power, high accuracy and low resistance resistor, and the resistance value of the resistance is, it is known that and electricity Resistance stabilization, error are small, it reduce the probability and difference of current measurement errors.
The voltage measurement passage 101 has positive and negative end, respectively has a connection at described the two poles of the earth of voltage measurement passage 101 End, for connecting other electronic components or circuit, the voltage measurement passage 101 is used to test the voltage of determinand.
The resistance 102 is connected with the connection end of the voltage measurement passage 101 so that the resistance 102 with it is described Voltage measurement passage 101 is in parallel, and the voltage measurement passage 101 can measure the voltage at the two ends of the resistance 102.The electricity Resistance 102 is used to be connected with current path to be measured such that it is able to according to magnitude of voltage and resistance that voltage measurement passage 101 is measured 102 resistance value obtains the current value in current path.In a specific embodiment, the Standard resistance range of the resistance 102 It is 5 milliohms to 100 milliohms, the impedance of its resistance 102 is small, is connected serially in current path, and the influence to electric current is smaller so as to electricity The measurement result of stream is more accurate.In this embodiment, the measuring instrument does not increase EM equipment module and current channel, And electric current is measured by way of resistance and voltage measurement path in parallel, the measurement range of electric current is expanded, and saved life Produce cost.
In a specific embodiment, because connecting line also has impedance, influence, the length of connecting line can be produced on measurement result Degree is shorter, and impedance is lower, therefore the length of connecting line is less than 5 centimetres, this method between the resistance 102 and the connection end So that measurement result is more accurate.
In a specific embodiment, Fig. 2 is refer to, the measuring instrument also includes data processing module 203, the number Be connected with voltage measurement passage 202 according to processing module 203, for by the magnitude of voltage measured by the voltage measurement passage 202 and Known resistance value is converted into current value.
It is described by setting the reduction formula between resistance value, and setting voltage, resistance and electric current in a program Reduction formula is I=U/R, wherein, I is the current value inside the current value inside resistance, i.e. current path, and U is voltage measurement The magnitude of voltage at the resistance two ends measured by passage, R is the resistance value of the resistance, and data processing module 203 can be according to conversion Formula calculates current value automatically, without user oneself calculating current value.Also, user can change data processing module 203 In resistance value, to meet when different current paths are tested, it is necessary to change the situation of resistance 201.In other specific implementations In mode, data can also be processed by way of user manually calculates, obtain current value.
The measuring instrument also includes display module 204, and the display module 204 is connected with data processing module 203, shows Show that module 204 can show acquired current value, and may also display the change curve of current value, oscillogram etc., institute The application of display module 204 is stated so that measurement result is more directly perceived, facilitates user to observe measurement result.In other specific embodiment parties In formula, measuring instrument can also be connected to computer, by the data message of Computer display electric current, or by artificial note Record shows the data message of electric current in the first-class mode of paper.
The measuring instrument that specific embodiment of the invention is proposed, resistance 102 is in parallel with voltage measurement passage 101, described Resistance 102 is used to be connected with current path to be measured, and the voltage measurement passage 101 is used to measure the two ends of the resistance 102 Magnitude of voltage, so as to converse the electricity of the current path to be measured by measured voltage and the resistance value of the resistance 102 Flow valuve.This measuring instrument effectively utilizes the voltage measurement of measuring instrument in the case of EM equipment module and current channel is not increased Passage 101, reaches reduction impedance, the effect of motor current measurement range so that measured current value is more accurate, and saves Production cost.
Further, the resistance 102 is short with the connection line length of the voltage measurement passage 101, reduces connecting line Resistance value so that the current value degree of accuracy of measurement is higher.
Fig. 3 is refer to, the present invention also provides a kind of method for measuring electric current.
The method of the measurement electric current includes:
Step S301:One measuring instrument is provided.The measuring instrument as shown in figure 1, including:Resistance 102, the resistance 102 are used to be connected serially in current path to be measured;Voltage measurement passage 101, with connection end, the connection end and resistance 102 Two ends connect, and make voltage measurement passage 101 in parallel with resistance 102, and the voltage measurement passage 101 is used to measure 102 liang of resistance Terminal voltage.
The measuring instrument has multiple voltage measurement passages 101, and multiple voltage measurement passages 101 can be changed simultaneously Dress, will voltage measurement passage 101 it is in parallel with resistance 102, this method can simultaneously measure the electric current to individual current path, carry The utilization ratio of voltage measurement passage 101 is risen.
The resistance 102 is high power, high accuracy and low resistance resistor, and the resistance value of the resistance is, it is known that and electricity Resistance stabilization, error are small, it reduce the probability and difference of current measurement errors.
The voltage measurement passage 101 has positive and negative end, respectively has a connection at described the two poles of the earth of voltage measurement passage 101 End, for connecting other electronic components or circuit, the voltage measurement passage 101 is used to test the voltage of determinand.
The resistance 102 is connected with the connection end of the voltage measurement passage 101 so that the resistance 102 with it is described Voltage measurement passage 101 is in parallel, and the voltage measurement passage 101 can measure the voltage at the two ends of the resistance 102.The electricity Resistance 102 is used to be connected with current path to be measured such that it is able to according to magnitude of voltage and resistance that voltage measurement passage 101 is measured 102 resistance value obtains the current value in current path.In a specific embodiment, the Standard resistance range of the resistance 102 It is 5 milliohms to 100 milliohms, the impedance of its resistance 102 is small, is connected serially in current path, and the influence to electric current is smaller so as to electricity The measurement result of stream is more accurate.In this embodiment, the measuring instrument does not increase EM equipment module and current channel, And electric current is measured by way of resistance and voltage measurement path in parallel, the measurement range of electric current is expanded, and saved life Produce cost.
In a specific embodiment, because connecting line also has impedance, influence, the length of connecting line can be produced on measurement result Degree is shorter, and impedance is lower, therefore the length of connecting line is less than 5 centimetres, this method between the resistance 102 and the connection end So that measurement result is more accurate.
Step S302:By in the resistant series to current path to be measured.Fig. 4 is refer to, resistance 102 and electric current are led to Road 401 is connected so that voltage measurement passage 101 is able to detect that the voltage at the two ends of resistance 102.Wherein, the current path Current input terminal is connected to the positive pole of the voltage measurement passage 101, and current output terminal is connected to the voltage measurement passage 101 Negative pole.
Step S303:Obtain the magnitude of voltage at the resistance two ends measured by voltage measurement passage.Measuring instrument is surveyed by voltage Amount passage 101 obtains magnitude of voltage, and the magnitude of voltage is the voltage at the two ends of the resistance 102.
Step S304:The current value in resistance value calculating current path according to the magnitude of voltage and the resistance.According to Calculated relationship between magnitude of voltage, resistance value and current value, draws the value by the electric current in the current path.
In a specific embodiment, Fig. 2 is refer to, the measuring instrument also includes data processing module 203, the number It is connected with voltage measurement passage 202 according to processing module 203, the voltage measurement can be led to by the data processing module 203 Magnitude of voltage and known resistance value measured by road 202 are converted into current value, by setting resistance value, and setting in a program Reduction formula between voltage, resistance and electric current, the reduction formula is I=U/R, wherein, I is the electric current inside resistance Value, i.e. current value inside current path, U is the magnitude of voltage at the resistance two ends measured by voltage measurement passage, and R is the resistance Resistance value, data processing module 203 can automatically calculate current value according to reduction formula, without user oneself calculating current Value.Also, user can change the resistance value in data processing module 203, to meet when different current paths are tested, need Change the situation of resistance 201.In other specific embodiments, can also be right by way of user manually calculates Data are processed, and obtain current value.
The measuring instrument also includes display module 204, and the display module 204 is connected with data processing module 203, can The current value that will be drawn by display module 204 is shown automatically, and may also display the change curve of current value, oscillogram Etc., the application of the display module 204 causes that measurement result is more directly perceived, facilitates user to observe measurement result.In other tools In body implementation method, measuring instrument can also be connected to computer, by the data message of Computer display electric current, Huo Zhetong Cross and be manually recorded in the data message that the first-class mode of paper shows electric current.
The method of measurement electric current of the invention is by providing a kind of resistance 101 measurement in parallel with voltage measurement passage 102 Instrument, measuring instrument is connected serially in current path to be measured, then 102 liang of the resistance as measured by voltage measurement passage 101 The magnitude of voltage at end, and resistance 102 resistance value, obtain the current value of the current path.The method of this measurement electric current has Effect reaches reduction impedance, the effect of motor current measurement range so that surveyed using the voltage measurement passage 101 of measuring instrument The current value of amount is more accurate.
Further, the resistance 102 is short with the connecting length of voltage measurement passage 101, reduces resistance value so that survey The current value degree of accuracy of amount is higher.
Fig. 5 is refer to, the present invention also provides a method for measuring mobile phone charging current.
The method of the measurement mobile phone charging current includes:
Step S501:One mobile phone, charger and measuring instrument are provided.The measuring instrument includes:Resistance 102, it is described Resistance 102 is used to be connected serially in current path to be measured;Voltage measurement passage 101, with connection end, the connection end and resistance 102 two ends connect, and make voltage measurement passage 101 in parallel with resistance 102, and the voltage measurement passage 101 is used to measure resistance 102 Both end voltage.
The measuring instrument has multiple voltage measurement passages 101, and multiple voltage measurement passages 101 can be changed simultaneously Dress, will voltage measurement passage 101 it is in parallel with resistance 102, this method can simultaneously measure the electric current to individual current path, carry The utilization ratio of voltage measurement passage 101 is risen.
The resistance 102 is high power, high accuracy and low resistance resistor, and the resistance value of the resistance is, it is known that and electricity Resistance stabilization, error are small, it reduce the probability and difference of current measurement errors.
The voltage measurement passage 101 has positive and negative end, respectively has a connection at described the two poles of the earth of voltage measurement passage 101 End, for connecting other electronic components or circuit, the voltage measurement passage 101 is used to test the voltage of determinand.
The resistance 102 is connected with the connection end of the voltage measurement passage 101 so that the resistance 102 with it is described Voltage measurement passage 101 is in parallel, and the voltage measurement passage 101 can measure the voltage at the two ends of the resistance 102.The electricity Resistance 102 is used to be connected with current path to be measured such that it is able to according to magnitude of voltage and resistance that voltage measurement passage 101 is measured 102 resistance value obtains the current value in charging current path.In a specific embodiment, the resistance of the resistance 102 Scope is 5 milliohms to 100 milliohms, and the impedance of its resistance 102 is small, is connected serially in current path, and the influence to electric current is smaller so that Measurement result to electric current is more accurate.In this embodiment, the measuring instrument does not increase EM equipment module and electric current Passage, and electric current is measured by way of resistance and voltage measurement path in parallel, the measurement range of electric current is expanded, and save Production cost.
In a specific embodiment, because connecting line also has impedance, influence, the length of connecting line can be produced on measurement result Degree is shorter, and impedance is lower, therefore the length of connecting line is less than 5 centimetres, this method between the resistance 102 and the connection end So that measurement result is more accurate.
Step S502:Mobile phone is connected to charger, and charger is connected to power supply.By the matched charging of mobile phone Device is connected, and by charger access power supply, mobile phone is started to charge up.
Step S503:By in the resistant series to the charging current path between mobile phone and charger.By the measurement Resistance 102 in instrument is connected with the charging current path, so that resistance two ends can produce voltage.Wherein, it is described to fill The current input terminal of electric current path is connected to the positive pole of the voltage measurement passage 101, and current output terminal is connected to the electricity Press the negative pole of Measurement channel 101.
Step S504:Obtain the magnitude of voltage for telling resistance two ends measured by voltage measurement path.Measuring instrument is by electricity Pressure Measurement channel obtains magnitude of voltage, and the magnitude of voltage is the voltage at the two ends of the resistance 102.
Step S505:The current value in resistance value calculating current path according to the magnitude of voltage and the resistance.According to Calculated relationship between magnitude of voltage, resistance value and current value, draws the value by the electric current in the current path.
In a specific embodiment, Fig. 2 is refer to, the measuring instrument also includes data processing module 203, the number It is connected with voltage measurement passage 202 according to processing module 203, the voltage measurement can be led to by the data processing module 203 Magnitude of voltage and known resistance value measured by road 202 are converted into current value, by setting resistance value, and setting in a program Reduction formula between voltage, resistance and electric current, the reduction formula is I=U/R, wherein, I is that the resistance inside is logical Current value inside the current value crossed, i.e. charging current path, U is the voltage at the resistance two ends measured by voltage measurement passage, R It is the resistance value of the resistance, data processing module 203 can automatically calculate current value according to formula and given data, without User oneself calculating current value.Also, user can change the resistance value in data processing module 203, to meet in test not With current path when, it is necessary to change the situation of resistance 201.In other specific embodiments, can also be artificial by user Data are processed by the mode of manual calculations, obtain current value.
The measuring instrument also includes display module 204, and the display module 204 is connected with data processing module 203, can Acquired current value is shown automatically by display module 204, and may also display the change curve of current value, oscillogram Etc., the application of the display module 204 causes that measurement result is more directly perceived, facilitates user to observe measurement result.In other tools In body implementation method, measuring instrument can also be connected to computer, by the data message of Computer display electric current, Huo Zhetong Cross and be manually recorded in the data message that the first-class mode of paper shows electric current.
The method of measurement mobile phone charging current of the invention, is connected by by mobile phone with charger, and charger is connected to Power supply, and the resistance 102 in measuring instrument is connected serially in the charging current path between mobile phone and charger, so as to The magnitude of voltage at the resistance two ends enough as measured by voltage measurement passage 101, and resistance resistance value, obtain it is described charge electricity The current value of logical circulation road.The method of the mobile phone charging current effectively using the voltage measurement passage 101 of measuring instrument, reaches drop Low ESR, the effect of motor current measurement range so that measured current value is more accurate.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, and these improvements and modifications also should be regarded as Protection scope of the present invention.

Claims (10)

1. a kind of measuring instrument, it is characterised in that including:
Resistance, the resistance is used to be connected serially in current path to be measured;
Voltage measurement passage, with connection end, the connection end is connected with resistance two ends, makes voltage measurement passage with resistance simultaneously Connection, the voltage measurement passage is used to measure resistance both end voltage.
2. measuring instrument according to claim 1, it is characterised in that also include:Data processing module, surveys with the voltage Amount passage connection, for the magnitude of voltage measured by voltage measurement passage to be converted into current value.
3. measuring instrument according to claim 1, it is characterised in that the resistance value scope of the resistance is 5 milliohms to 100 Milliohm.
4. measuring instrument according to claim 1, it is characterised in that the length of connecting line between the resistance and connection end Less than 5 centimetres.
5. measuring instrument according to claim 1, it is characterised in that also include:Display module, with the data processing mould Block is connected, for showing current information.
6. it is a kind of measure electric current method, it is characterised in that including:
A measuring instrument is provided, the measuring instrument includes:Resistance, the resistance is used to being connected serially in current path to be measured, Voltage measurement passage, with connection end, the connection end is connected with resistance two ends,
Make voltage measurement passage in parallel with a resistor, the voltage measurement passage is used to measure resistance both end voltage;
By in the resistant series to current path to be measured;
Obtain the magnitude of voltage at the resistance two ends measured by voltage measurement passage;
The current value in resistance value calculating current path according to the magnitude of voltage and the resistance.
7. it is according to claim 6 measurement electric current method, it is characterised in that the resistance value scope of the resistance be 5 milli Europe is to 100 milliohms.
8. it is according to claim 6 measurement electric current method, it is characterised in that connecting line between the resistance and connection end Length be less than 5 centimetres.
9. it is a kind of measure mobile phone charging current method, it is characterised in that including:
A mobile phone, charger and measuring instrument are provided, the measuring instrument includes:Resistance, the resistance is used to be connected serially to treat The current path of survey is interior, voltage measurement passage, and with connection end, the connection end is connected with resistance two ends, leads to voltage measurement Road is in parallel with a resistor, and the voltage measurement passage is used to measure resistance both end voltage;
Mobile phone is connected to charger, and charger is connected to power supply;
By in the resistant series to the charging current path between mobile phone and charger;
Obtain the magnitude of voltage at the resistance two ends measured by voltage measurement passage;
Resistance value according to the magnitude of voltage and the resistance calculates the current value in the charging current path.
10. it is according to claim 9 measurement mobile phone charging current method, it is characterised in that the resistance value of the resistance Scope is 5 milliohms to 100 milliohms.
CN201611196544.5A 2016-12-22 2016-12-22 The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current Pending CN106771487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611196544.5A CN106771487A (en) 2016-12-22 2016-12-22 The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611196544.5A CN106771487A (en) 2016-12-22 2016-12-22 The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current

Publications (1)

Publication Number Publication Date
CN106771487A true CN106771487A (en) 2017-05-31

Family

ID=58900301

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611196544.5A Pending CN106771487A (en) 2016-12-22 2016-12-22 The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current

Country Status (1)

Country Link
CN (1) CN106771487A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110879316A (en) * 2018-09-05 2020-03-13 Oppo(重庆)智能科技有限公司 Terminal charging current detection method, system and storage medium
WO2021027768A1 (en) * 2019-08-14 2021-02-18 上海爻火微电子有限公司 Current measurement circuit for power channel, and electronic device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110879316A (en) * 2018-09-05 2020-03-13 Oppo(重庆)智能科技有限公司 Terminal charging current detection method, system and storage medium
CN110879316B (en) * 2018-09-05 2022-03-22 Oppo(重庆)智能科技有限公司 Terminal charging current detection method, system and storage medium
WO2021027768A1 (en) * 2019-08-14 2021-02-18 上海爻火微电子有限公司 Current measurement circuit for power channel, and electronic device

Similar Documents

Publication Publication Date Title
CN101183142B (en) On-line measurement method of accumulator cell essential resistance, electrical current work module and accumulator cell essential resistance on-line measurement instrument
CN101435838B (en) Apparatus for measuring capacitance capacity
CN102590609B (en) The method of mobile terminal and measurement mobile terminal power consumption
CN1882843A (en) Battery cell voltage and impedance measuring circuit
CN105068016B (en) Battery capacity display control method and control circuit
CN109116251B (en) A kind of lithium battery parameter identification method based on combined type operating condition
CN106771487A (en) The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current
CN206114775U (en) Multi -functional DC resistance measuring appearance
CN107181300A (en) Charge protector, the method and apparatus for calibrating charging equipment
CN109901082A (en) Portable electric energy system and its measurement method
CN103379421B (en) The working state detecting method of digital microphone channel selecting pin and device
CN102890243B (en) A kind of battery electric quantity measuring circuit, measurement apparatus and battery meter
CN108152592A (en) A kind of lead impedance measuring system
CN201037863Y (en) Voltage measurement module for on-line measuring accumulator internal resistance and accumulator internal resistance on-line measuring instrument
CN103454509A (en) Mobile phone charging detecting system and mobile phone charging detecting method
CN207318677U (en) Controllable dry cell discharge curve measuring circuit
CN103078363A (en) Battery cell identification circuit and identification method thereof
CN104577240B (en) The determination method of lithium ion accumulator and its characteristic with measurement battery
CN206281894U (en) Measuring instrument
CN105938161B (en) A kind of test method and system of the internal resistance of cell
CN202393834U (en) Precise ohmic internal resistance measurer for battery
CN204964670U (en) Electric energy strapping table inspection of a line appearance of visiting one house after another
CN105629176A (en) Battery capacity test method, rechargeable battery charging circuit and electronic equipment
CN201037864Y (en) Electric current working module for on-line measuring accumulator internal resistance and accumulator internal resistance on-line measuring instrument
CN105896645A (en) Charging function detection method, apparatus, and system for mobile terminal

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination