CN206281894U - Measuring instrument - Google Patents
Measuring instrument Download PDFInfo
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- CN206281894U CN206281894U CN201621415937.6U CN201621415937U CN206281894U CN 206281894 U CN206281894 U CN 206281894U CN 201621415937 U CN201621415937 U CN 201621415937U CN 206281894 U CN206281894 U CN 206281894U
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- resistance
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- voltage measurement
- measuring instrument
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Abstract
A kind of measuring instrument, including：Resistance；Voltage measurement passage, with connection end, the connection end is connected with resistance two ends, makes voltage measurement passage in parallel with a resistor.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
Technical field
The utility model is related to measuring instrument field, more particularly to a kind of measuring instrument.
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.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of measuring instrument so that measuring instrument can be lifted
The precision of the current value of measurement.
In order to solve the above problems, the utility model provides a kind of measuring instrument, including：Resistance；Voltage measurement passage,
With connection end, the connection end is connected with resistance two ends, makes voltage measurement passage in parallel with a resistor.
Optionally, the length of connecting line is less than 5 centimetres between the resistance and connection end.
Measuring instrument of the present utility model, resistance is in parallel with voltage measurement passage, and the resistance is used for and electric current to be measured
Paths connected in series, the voltage measurement passage is used to measure the magnitude of voltage at the resistance two ends, thus by measured voltage with
The resistance value of the resistance converses the current value of the current path to be measured.This measuring instrument is not increasing EM equipment module
In the case of current channel, effectively using the voltage measurement passage of measuring instrument, reduction impedance, motor current measurement range are reached
Effect 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.
Brief description of the drawings
Fig. 1 is the schematic diagram of the measuring instrument of the specific embodiment of the utility model one；
Fig. 2 is the module map of the measuring instrument of the specific embodiment of the utility model one；
Fig. 3 is the flow chart of the method for the measurement electric current of the specific embodiment of the utility model one；
Fig. 4 is the measuring instrument of the specific embodiment of the utility model one 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 specific embodiment of the utility model one.
Specific embodiment
The specific embodiment of the measuring instrument for providing the utility model below in conjunction with the accompanying drawings elaborates.
Fig. 1 is refer to, is the schematic diagram of the measuring instrument of the specific embodiment of the utility model one.
The measuring instrument includes：A kind of measuring instrument, including：Resistance；Voltage measurement passage, it is described with connection end
Connection end is connected with resistance two ends, makes voltage measurement passage in parallel with a resistor.
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 present utility model is proposed, resistance is in parallel with voltage measurement passage, the electricity
Hinder for being connected with current path to be measured, the voltage measurement passage is used to measure the magnitude of voltage at the resistance two ends, so that
The current value of the current path to be measured is conversed by measured voltage and the resistance value of the resistance.This measuring instrument
Device, effectively using the voltage measurement passage of measuring instrument, reaches reduction resistance in the case of EM equipment module and current channel is not increased
It is anti-, the effect of motor current measurement range 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.
Fig. 3 is refer to, the utility model 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 present utility model is in parallel with voltage measurement passage 102 by providing a kind of resistance 101
Measuring instrument, measuring instrument is connected serially in current path to be measured, then the resistance as measured by voltage measurement passage 101
The magnitude of voltage at 102 two ends, and resistance 102 resistance value, obtain the current value of the current path.The side of this measurement electric current
Method effectively using the voltage measurement passage 101 of measuring instrument, reaches reduction impedance, the effect of motor current measurement range so that
Measured current value 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.
Refer to Fig. 5, the method that the utility model also provides a measurement 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 present utility model, is connected by by mobile phone with charger, and charger is connected
Power supply is connected to, and the resistance 102 in measuring instrument is connected serially in the charging current path between mobile phone and charger, from
And can as the magnitude of voltage at the resistance two ends measured by voltage measurement passage 101, and resistance resistance value, obtain described in fill
The current value of electric current path.The method of the mobile phone charging current effectively using the voltage measurement passage 101 of measuring instrument, reaches
To reduction impedance, the effect of motor current measurement range so that measured current value is more accurate.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
Art personnel, on the premise of the utility model principle is not departed from, can also make some improvements and modifications, these improvements and modifications
Also should be regarded as protection domain of the present utility model.
Claims (2)
1. a kind of measuring instrument, it is characterised in that including：
Resistance；
Voltage measurement passage, with connection end, the connection end is connected with resistance two ends, makes voltage measurement passage with resistance simultaneously
Connection.
2. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621415937.6U CN206281894U (en) | 2016-12-22 | 2016-12-22 | Measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621415937.6U CN206281894U (en) | 2016-12-22 | 2016-12-22 | Measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281894U true CN206281894U (en) | 2017-06-27 |
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ID=59073256
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621415937.6U Active CN206281894U (en) | 2016-12-22 | 2016-12-22 | Measuring instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771487A (en) * | 2016-12-22 | 2017-05-31 | 上海传英信息技术有限公司 | The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current |
-
2016
- 2016-12-22 CN CN201621415937.6U patent/CN206281894U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771487A (en) * | 2016-12-22 | 2017-05-31 | 上海传英信息技术有限公司 | The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current |
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