CN207133352U - A kind of current measuring device and system - Google Patents
A kind of current measuring device and system Download PDFInfo
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- CN207133352U CN207133352U CN201720895932.6U CN201720895932U CN207133352U CN 207133352 U CN207133352 U CN 207133352U CN 201720895932 U CN201720895932 U CN 201720895932U CN 207133352 U CN207133352 U CN 207133352U
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Abstract
The utility model provides a kind of current measuring device and system, and the electric current of the power supply to be measured of the equipment under test in incubator is measured for realizing.The current measuring device includes：Measure main body；At least one connecting line, the first end of every connecting line are connected in the measurement main body；At least one sampling probe, each sampling probe are connected with the second end of every connecting line；Wherein, when needing the power supply to be measured to the equipment under test in an incubator to measure, the measurement main body is placed on outside the incubator, at least one sampling probe is placed in the incubator, the measurement main body obtains at least one sampled data of at least one sampling probe by least one connecting line, and the measurement electric current of the power supply to be measured is obtained based at least one sampled data.
Description
Technical field
Electronic technology field is the utility model is related to, more particularly to a kind of current measuring device and system.
Background technology
Before electronic product dispatches from the factory, businessman usually requires to measure the performance-relevant parameter of electronic product, to protect
Demonstrate,proving it being capable of normal work.An important parameter of the electric current as electronic product, typically test measurement process in one can not
The measurement parameter lacked.
At present, when measuring the electric current of electronic product, it is necessary to which equipment under test and current measuring device are positioned over into same open
Put in environment, in order to ensure the normal work of current measuring device, the temperature of the open environment needs to be suitable to current measuring device.
Conventional current measuring device mainly includes ammeter, universal meter etc..But in the exploitation, test and application process of electronic product
In, often need for product to be positioned over the high and low temperature environment of incubator.But existing current measuring device generally can not be in high/low temperature ring
Normal work in border, it can not be put into together with test product in incubator, otherwise be easily damaged measurement apparatus.Therefore, in needs pair
When the electric current of each power supply of electronic equipment internal in incubator measures, existing current measuring device is simultaneously uncomfortable
With.
Utility model content
The utility model embodiment provides a kind of current measuring device and system, for realizing to the equipment under test in incubator
The electric current of power supply to be measured measure.
In a first aspect, the utility model embodiment provides a kind of current measuring device, including：
Measure main body；
At least one connecting line, the first end of every connecting line are connected in the measurement main body；
At least one sampling probe, each sampling probe are connected with the second end of every connecting line；
Wherein, when needing the power supply to be measured to the equipment under test in an incubator to measure, the measurement main body is put
Put outside the incubator, at least one sampling probe be placed in the incubator, it is described measurement main body by it is described extremely
A few connecting line obtains at least one sampled data of at least one sampling probe, and is based at least one sampling
Data obtain the measurement electric current of the power supply to be measured.
Optionally, each sampling probe includes sampling resistor at least one sampling probe, when described at least one
When individual sampling probe is connected with the power supply to be measured, each sampling probe is to the electric current of the power supply output to be measured in each sampling
The voltage signal of the voltage difference formed on the sampling resistor of probe is sampled, and obtains at least one voltage signal.
Optionally, the Standard resistance range of the sampling resistor is [0.1m Ω, 50m Ω].
Optionally, every connecting line at least one connecting line is twisted-pair feeder.
Optionally, transmission means of at least one voltage signal in the twisted-pair feeder is differential transfer mode.
Optionally, the measurement main body includes：
Difference amplifier, for amplifying at least one voltage signal, obtain at least one amplified voltage signal；
Analog-digital converter, it is connected with the difference amplifier, at least one amplified voltage signal to be converted
For data signal；
Processor, it is connected with the analog-digital converter, for receiving and handling the number of the analog-digital converter output
Word signal, to determine the measurement electric current of the power supply to be measured.
Optionally, the measurement main body also includes：
Wave filter, between the difference amplifier and the analog-digital converter, for filtering out at least one warp
Amplify the interference signal in voltage signal, obtain at least one amplified voltage signal after filtering interference signals, and by described in
At least one amplified voltage signal after filtering interference signals is transmitted to the analog-digital converter.
Optionally, the measurement main body also includes：
Display, it is connected with the processor, for showing the numerical value and/or waveform of the measurement electric current.
Optionally, the current measuring device also includes：
Power supply, it is connected with the measurement main body, for providing working power for the measurement main body.
Second aspect, the utility model embodiment provide a kind of current measurement system, including：
Incubator, including threading hole and accommodation space, the accommodation space are used to house equipment under test；
Current measuring device as described in relation to the first aspect, for the electricity to be measured of the equipment under test housed to the incubator
Source measures, to obtain the measurement electric current of the power supply to be measured.
The one or more technical schemes provided in the utility model embodiment, at least have the following technical effect that or excellent
Point：
1st, because the measurement main body of current measuring device can pass through at least one connecting line and at least one sampling probe
Connection, and in connection, measurement main body is in outside incubator, and sampling probe is in incubator, and sampling probe is only for electricity
Stream is sampled, and its sampling process is not influenceed by warm the temperature inside the box.So, in measurement process, it is only necessary to which current measurement is filled
At least one sampling probe put is placed in incubator and is connected with the power supply to be measured of equipment under test, and then at least one sampling probe can
The electric current of the power supply to be measured of equipment under test is sampled, and sampled data is transferred to the measurement main body outside incubator and carried out
Processing, the electric current of power supply to be measured is determined, realize the measurement of the electric current to the power supply to be measured of equipment under test, metering system is relatively simple
Reliably.Simultaneously as without whole current measuring device is in incubator, can also avoid measuring main body in current measuring device
Work influenceed by temperature in incubator, improve current measuring device measurement incubator in power supply to be measured electric current precision.
2nd, due to being provided with sampling resistor in each sampling probe of current measuring device, the sampling resistor will can sample
The electric current of the power supply to be measured of probe connection is converted to corresponding voltage signal, passes through sampling of the sampling probe to voltage signal and biography
It is defeated, you can the measurement main body that the sampled data related to electric current is transferred to outside incubator is handled, to determine to measure electric current, carried
The high accuracy of measurement result.
3rd, due to measurement main body and at least one sampling probe between at least one connecting line employ twisted-pair feeder, make to
The voltage signal of few Sample acquisition sampling is transmitted in twisted-pair feeder in a manner of differential signal, enhances current measurement
The antijamming capability of device, improve the precision of sampled data.
Brief description of the drawings
Fig. 1 is the structural representation of current measuring device in the utility model embodiment；
Fig. 2 is the schematic diagram that at least one sampling probe is connected with power supply to be measured in the utility model embodiment；
Fig. 3 is the structural representation of the measurement main body of current measuring device in the utility model embodiment；
Fig. 4 is the structural representation of current measurement system in the utility model embodiment.
Embodiment
The utility model embodiment technical scheme is described in detail below by accompanying drawing and specific embodiment, should
It is to the detailed of the utility model embodiment technical scheme to understand the specific features in the utility model embodiment and embodiment
Explanation, rather than the restriction to the utility model embodiment technical scheme, in the case where not conflicting, the utility model is implemented
Technical characteristic in example and embodiment can be mutually combined.
In the utility model embodiment, equipment under test can be communication apparatus, such as mobile phone, transmitting set, reception
The different equipment such as machine, wireless router, the utility model embodiment are not restricted to this.
In addition, the terms "and/or", only a kind of incidence relation for describing affiliated partner, represents there may be
Three kinds of relations, for example, A and/or B, can be represented：Individualism A, while A and B be present, these three situations of individualism B.Separately
Outside, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
The utility model embodiment preferred embodiment is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the utility model embodiment provides a kind of current measuring device, the current measuring device is included at least
One sampling probe 10, the measurement connecting line 30 of main body 20 and at least one, one end of every connecting line 30 is connected to measurement main body
On 20, the other end of every connecting line 30 is connected with sampling probe 10.It is tested in using current measuring device measurement incubator
During the electric current of the power supply to be measured of equipment, measurement main body 20 may be at outside incubator, and at least one sampling probe 10 can be at incubator
It is interior.
In the utility model embodiment, current measuring device can be used for the to be measured of the equipment under test that measurement is in incubator
The electric current of power supply.Incubator can need to provide the measuring environment of relevant temperature after power-up is run according to measurement, such as can be to production
Product carry out low high temperature alternating test and constant temperature test etc..The wider range that incubator provides, it is usually [- 80 DEG C, 150 DEG C].
In actual applications, user (such as survey crew) can set the temperature in incubator according to the actual requirements.
Equipment under test can include one or more power supplys to be measured, and power supply to be measured can be at least one in equipment under test
Functional part is divided to provide working power.For example, power supply to be measured can be the power module of each functional part, multiple functional parts can
To use same power module or multiple power modules can also be used.
In the utility model embodiment, at least one sampling probe 10 can be used for the electricity to be measured with equipment under test in incubator
Source is connected, and the electric current of power supply to be measured is sampled, and obtains sampled data.
In actual applications, sampling probe 10 can have variform, such as clipping form, contact form.This
In utility model embodiment so that sampling probe 10 is in the form of contact as an example, such as sampling probe 10 is to include two metal contacts
The sampling plug of body.So, the connection of sampling probe 10 and power supply to be measured, can refer to the metal contact of sampling probe 10
The measurement socket of equipment under test is inserted, the circuit being connected with power supply to be measured, metal contact can be provided with the measurement socket
Electric power loop can be formed with the circuit in measurement socket after insertion measurement socket, the electric current of power supply to be measured will be transmitted to sampling probe
In 10.
As shown in Fig. 2 it is at least one sampling probe 10 in the utility model embodiment and the power supply to be measured of equipment under test
The schematic diagram of connection.In figure, a sampling probe 10 and its power supply to be measured of connection are only shown.In Fig. 2, the sampling probe 10 with
The power supply to be measured connection of equipment under test, can be the measurement socket that equipment under test is inserted by metal contact.
In the application, each sampling probe includes sampling resistor at least one sampling probe 10.Sampling probe 10 wraps
The sampling resistor included can be connected between metal contact (popping one's head in), still referring to Fig. 2.Then when sampling probe 10 passes through gold
After category contact is connected with power supply to be measured, the electric current of power supply to be measured can flow through the sampling resistor of sampling probe 10, and sampling resistor can
Electric current from power supply to be measured is converted into voltage, the voltage is exactly the voltage difference at sampling resistor both ends, and sampling probe 10 can
To obtain voltage signal corresponding to the voltage difference, the voltage signal is sampled data.
Wherein, the Standard resistance range of sampling resistor can be [0.1m Ω, 50m Ω].In actual applications, the sampling electricity of setting
The resistance of resistance can be related to the range of the electric current of the power supply to be measured of measurement.In the utility model embodiment, the different magnitudes of current
Journey can select the sampling resistor of different resistances, make it that gamut is equally accurate.
If for example, the range of the electric current of power supply to be measured for (0,0.5A], then can use 50m Ω sampling resistor；Or
If the range of the electric current of power supply to be measured for (0.5A, 2.5A], then can use 10m Ω sampling resistor；Or if power supply to be measured
Electric current range for (2.5A, 5A], then can use 5m Ω sampling resistor；Or the if range of the electric current of power supply to be measured
For (5A, 12.5A], then can be using 2m Ω sampling resistor；Or if the electric current of power supply to be measured range for (12.5A,
25A], then can be using 1m Ω sampling resistor, etc..
In actual applications, if setting the resistance very little of sampling resistor in sampling probe 10, when sample rate current is smaller, adopt
The voltage signal that sample arrives is also with regard to very little, and so, transmission, amplification, the A/D conversions of small voltage signal are all readily incorporated larger error,
Make precise decreasing.And in the utility model embodiment, it can be used greatly with different resistance, i.e. small-range according to different current ranges
Resistance, wide range small resistor so that the voltage signal sampled be maintained at one be more suited to signal transmission, amplification,
The level of A/D conversions, ensure that the high accuracy of gamut.
After at least one sampling probe 10 obtains voltage signal (i.e. sampled data), voltage signal can be passed through at least one
Connecting line 30 is transferred to measurement main body 20 and handled, and at least one connecting line 30 can be the connecting line of plug-in.
Next, the measurement main body 20 that current measuring device in the utility model embodiment will be introduced.
As shown in figure 3, to measure the structural representation of main body 20 in current measuring device.Measurement main body 20 can include more
Individual interface (in figure exemplified by N number of, N is the positive integer more than 2), difference amplifier, wave filter, modulus (A/D) converter, processing
Device and display, the arrow in figure can characterize the data transfer direction between functional part.In addition, measurement main body 20 is also
Other functional parts such as serial line interface, memory and function button can be included, because these functional parts are unnecessary functions
Part, shown with dotted line frame in figure.
It should be noted that only show to measure each functional part of main body 20 in Fig. 3, but in actual applications, each
Functional part is corresponding with corresponding circuit, and its circuit realiration refers to the circuit implementations of existing functional part, this practicality
Repeated no more in new embodiment.
Below by respectively to measure main body 20 each functional part function and each functional part between annexation enter
Row is introduced.
The multiple interfaces set in measurement main body 20 can be used for measurement main body 20 being connected with least one connecting line 30,
And then it is attached by least one connecting line 30 and multiple sampling probes 10.In actual applications, main body 20 is measured logical
When crossing at least one connecting line 30 and being connected with least one sampling probe 10, each interface can be with least one connecting line
30 one end carries out the connection of plug-in, and the other end of at least one connecting line 30 can be connected with sampling probe 10.For example,
As shown in figure 3, the interface 1 in measurement main body 20 can be connected with one end of connecting line 30, the other end of connecting line 30 and sampling
The interface 1 ' of probe 1 is connected, and similarly, interface 2 is connected by connecting line 30 with the interface 2 ' of sampling probe 2 ... ..., and interface N leads to
Connecting line 30 is crossed to be connected with sampling probe N interface N '.
So, after the sampled data that the electric current of the power supply to be measured of the equipment under test in incubator is obtained in sampling probe 10, just
Sampled data can be transferred to by measurement main body 20 by corresponding at least one connecting line 30, measurement main body 20 passes through to respectively adopting
The sampled data of sample probe 10 enters processing, you can determines the measurement electric current of the power supply to be measured of the sampling probe 10 connection, realizes electricity
The flow measuring apparatus measurement to the electric currents of multiple power supplys to be measured simultaneously.For example, 8 interfaces can be set in measurement main body 20, then
8 sampling probes 10 can be connected by least one connecting line 30, then, it is respectively connected with electricity to be measured in 8 sampling probes 10
During source, current measuring device can obtain the sampled data of each sampling probe 10, and calculate what each sampling probe 10 connected
The electric current (measuring electric current) of power supply to be measured.
Wherein, at least one connecting line 30 can be twisted-pair feeder, and the interface in Fig. 3 can be multiple twin line interface.This
When, the voltage signal (i.e. sampled data) that at least one sampling probe 10 obtains can be in a manner of differential signal in twisted-pair feeder
It is transmitted, to improve anti-interference of the sampled data in transmitting procedure.
In the utility model embodiment, the difference amplifier that measurement main body 20 includes can be connected with multiple interfaces, difference
Amplifier can be amplified to the voltage signal of each interface, so that the wave amplitude of voltage signal turns close to the A/D of rear class
The range ability of parallel operation, reach maximum precision.
Measure in main body, A/D converter can be connected with difference amplifier, for the voltage signal after amplification to be converted into
Data signal.
In actual applications, because difference amplifier to voltage signal while being amplified, corresponding interference signal
Also it is exaggerated.In order to reduce the influence of interference information, wave filter can be provided between difference amplifier and A/D converter, should
Wave filter can be used for filtering out the interference signal in the voltage signal after difference amplifier amplifies, and by after filtering interference signals
Voltage signal be transferred to A/D converter carry out A/D conversions.
In the utility model embodiment, the processor of measurement main body 20 can be embeded processor, such as arm processor.
Processor is connected with A/D converter, for receiving and handling the data signal of A/D converter output, determines the survey of power supply to be measured
Measure electric current.
Processor can be according to the result of data signal and the resistance of sampling resistor when calculating and measuring electric current
What value was carried out.For example, processor, by the processing to data signal, it is 0.025V to determine the voltage difference on sampling resistor, if
The resistance of the sampling resistor of setting is 5m Ω, then the electric current that can calculate the power supply to be measured of the connection of sampling probe 10 is 5A.
In the utility model embodiment, processor can be exported it is determined that after measurement electric current by the display of connection
The related data of electric current is measured, such as measures the numerical value and/or waveform of electric current, is easy to later stage survey crew according to measurement electric current
Related data is assessed etc. the performance of power supply to be measured.
In actual applications, the display can be liquid crystal display, such as can be 3.2 cun of liquid crystal displays.Then locate
The related data of measurement electric current corresponding to each sampling probe 10 can be transferred on liquid crystal display and be shown by reason device, or,
Any one or any number of sampling probes 10, and the correlation for electric current being measured corresponding to the sampling probe 10 of selection can be selected
Data show simultaneously.
In addition, processor can will also measure the related data storage of electric current to the storage of connection it is determined that after measurement electric current
In device, it is easy to user to check the numerical value and/or waveform of the history measurement electric current of every power supply to be measured of storage at any time.The memory can
Be support power down preserve memory, as flash memory (Flash), random access memory (Random Access Memory,
) and magnetic disk storage etc. RAM.
In another embodiment, measurement main body 20 can also include function button, and it is aobvious that the function button can be used for change
Show pattern, such as in the related data of display measurement electric current, can be shown by the function button in numerical value and waveform is shown
Between switch over.Certainly, the function button can be also used for carrying out other functions, such as set the way of the measurement electric current of display
Deng.
In addition, measurement main body 20 is also provided with the serial line interface being connected with processor, then determine to measure in processor
After electric current, the correlation values of the measurement electric current on each road can be transferred to other electronic equipments (such as pen by processor by serial line interface
Remember this computer, PAD etc.) on, it is easy to implement host computer monitoring.
In the utility model embodiment, current measuring device can also include the power supply being connected with measurement main body 20,
The power supply can be used for providing working power for measurement main body 20, so that each functional part carries out normal work.
In practical application, when being measured using current measuring device to the equipment under test in incubator, its substantially flow
Can be：First, it is electric on current measuring device；Then, current measuring device initialization survey main body 20, for example, to processor,
Serial line interface, display, A/D converter are initialized；And then current measuring device circulation sampled and handled, i.e.,
Sampled data is obtained by sampling probe 10, and by measuring processing of the main body 20 to sampled data, such as amplification, filtering, AD
Conversion etc., you can determine measurement electric current corresponding to the power supply to be measured that each sampling probe 10 connects, or even can will measure the number of electric current
Value and/or waveform renewal are to showing on display；And then current measuring device can capture key information, be pressed if any button,
Then renewal sets or switched display pattern, otherwise returns the beginning of circulation.
Current measuring device in the utility model, the electric current of the power supply to be measured of the equipment under test in incubator are surveyed
During amount, at least one sampling probe 10 of current measuring device is placed in incubator together with equipment under test, and measurement main body 20 is placed
Outside the incubator, measurement main body 20 is not influenceed by the temperature in incubator, and realize out of incubator external monitor incubator tested sets
The electric current of standby power supply to be measured, and measurement accuracy only relies upon the measurement main body 20 of current measuring device, and measurement has been effectively ensured
During, the precision of the measurement in the range of the total temperature of incubator to the electric current of power supply to be measured is higher.
As shown in figure 4, the utility model embodiment also provides a kind of current measurement system, the current measurement system can wrap
Incubator 200 and current measuring device 100 are included, incubator 200 can include threading hole and accommodation space, and current measuring device 100 can
To be current measuring device as shown in Figure 1, it can include measurement main body 20, at least one sampling probe 10 and at least one
Connecting line 30.Measurement main body 20 can be connected by least one connecting line 30 with least one sampling probe 10, and this at least one
Bar connecting line 30 runs through the threading hole of incubator 200, and the first end being connected in the connecting line plugged with measurement main body 20 is positioned at temperature
Outside case 200, the second end being connected with least one sampling probe 10 is located in incubator 200.
Wherein, the accommodation space of incubator 200 can be used for accommodating equipment under test, such as communication apparatus etc., the equipment under test
One or more power supplys to be measured can be included, power supply to be measured can provide work at least a portion functional part of equipment under test
Power supply.
Each sampling probe 10 includes sampling resistor at least one sampling probe 10 of current measuring device 100, works as electricity
When flow measuring apparatus 100 is connected by least one sampling probe 10 with power supply to be measured, at least one sampling probe 10 can be right
The voltage signal for the voltage difference that the electric current of power supply output to be measured is formed on the sampling resistor of each sampling probe 10 is adopted
Sample, and voltage signal is transmitted by least one connecting line 30 to measurement main body 20, measure voltage of the main body 20 according to reception
Signal can calculate the measurement electric current of power supply to be measured.
Multiple interfaces can be provided with measurement main body 20, each interface passes through at least one connecting line 30 and sampling probe
10 connections or separation.
In the application, at least one connecting line 30 can be twisted-pair feeder, then voltage signal in twisted-pair feeder with differential signal
Mode be transmitted so that the anti-interference of sampled data is stronger in transmitting procedure.
In the utility model embodiment, the measurement main body 20 of current measuring device 100 can include difference amplifier, A/D
Converter and processor, refer to Fig. 3.Wherein, difference amplifier can be connected with multiple interfaces, so as to which measurement main body 20 be connect
The voltage signal of receipts is amplified.
A/D converter is connected with difference amplifier, and number is converted to available for the voltage signal after difference amplifier is amplified
Word signal.
Processor, it is connected with A/D converter, can receives and handle the data signal of A/D converter output, and pass through calculating
Determine the measurement electric current of power supply to be measured.
In addition, understand that the measurement main body 20 of current measuring device 100 can also wrap in addition to above-mentioned functional part with reference to Fig. 3
Include the other functional parts of such as memory and display, the correlation functions of other each functional parts refer to it is described above, herein
Repeat no more.
In the utility model embodiment, when being measured using current measurement system to the power supply to be measured of equipment under test,
The measurement main body 20 of current measuring device 100 is positioned over outside incubator 200, and sampling probe 10 is placed in incubator together with equipment under test
In 200, the electric current of the power supply to be measured for the equipment under test being achieved that out of incubator 200 external monitor incubator 200, and measurement accuracy is only
Dependent on the measurement main body 20 of current measuring device 100, and measurement main body 20 will not be influenceed by the temperature in incubator 200, therefore
While realization measures to the electric current of the power supply to be measured of the equipment under test in incubator 200, moreover it is possible to by according to current range
To set the resistance of sampling resistor to ensure that the grade of measurement is accurate.
Obviously, those skilled in the art can to the utility model embodiment carry out it is various change and modification without departing from
The spirit and scope of the utility model embodiment.So, if these modifications and variations of the utility model embodiment belong to this
Within the scope of utility model embodiment claim and its equivalent technologies, then the utility model embodiment is also intended to include these
Including change and modification.
Claims (10)
- A kind of 1. current measuring device, it is characterised in that including：Measure main body；At least one connecting line, the first end of every connecting line are connected in the measurement main body；At least one sampling probe, each sampling probe are connected with the second end of every connecting line；Wherein, when needing the power supply to be measured to the equipment under test in an incubator to measure, the measurement main body is placed on Outside the incubator, at least one sampling probe is placed in the incubator, the measurement main body passes through described at least one Bar connecting line obtains at least one sampled data of at least one sampling probe, and is based at least one sampled data Obtain the measurement electric current of the power supply to be measured.
- 2. current measuring device as claimed in claim 1, it is characterised in that each sampled at least one sampling probe Probe includes sampling resistor, when at least one sampling probe is connected with the power supply to be measured, each sampling probe pair The voltage signal for the voltage difference that the electric current of the power supply output to be measured is formed on the sampling resistor of each sampling probe enters Row sampling, obtains at least one voltage signal.
- 3. current measuring device as claimed in claim 2, it is characterised in that the Standard resistance range of the sampling resistor is [0.1m Ω, 50m Ω].
- 4. current measuring device as claimed in claim 2, it is characterised in that every connection at least one connecting line Line is twisted-pair feeder.
- 5. current measuring device as claimed in claim 4, it is characterised in that at least one voltage signal is in the multiple twin Transmission means in line is differential transfer mode.
- 6. the current measuring device as described in any claim in claim 1-5, it is characterised in that the measurement main body includes：Difference amplifier, for amplifying at least one voltage signal, obtain at least one amplified voltage signal；Analog-digital converter, it is connected with the difference amplifier, at least one amplified voltage signal to be converted into number Word signal；Processor, it is connected with the analog-digital converter, for receiving and handling the numeral letter of the analog-digital converter output Number, to determine the measurement electric current of the power supply to be measured.
- 7. current measuring device as claimed in claim 6, it is characterised in that the measurement main body also includes：Wave filter, it is described at least one amplified for filtering out between the difference amplifier and the analog-digital converter Interference signal in voltage signal, at least one amplified voltage signal after filtering interference signals is obtained, and filtered out described At least one amplified voltage signal after interference signal is transmitted to the analog-digital converter.
- 8. current measuring device as claimed in claim 6, it is characterised in that the measurement main body also includes：Display, it is connected with the processor, for showing the numerical value and/or waveform of the measurement electric current.
- 9. current measuring device as claimed in claim 8, it is characterised in that the current measuring device also includes：Power supply, it is connected with the measurement main body, for providing working power for the measurement main body.
- A kind of 10. current measurement system, it is characterised in that including：Incubator, including threading hole and accommodation space, the accommodation space are used to house equipment under test；Current measuring device as described in any claims of claim 1-9, for the equipment under test housed to the incubator Power supply to be measured measure, to obtain the measurement electric current of the power supply to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895932.6U CN207133352U (en) | 2017-07-20 | 2017-07-20 | A kind of current measuring device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895932.6U CN207133352U (en) | 2017-07-20 | 2017-07-20 | A kind of current measuring device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207133352U true CN207133352U (en) | 2018-03-23 |
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ID=61639276
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720895932.6U Expired - Fee Related CN207133352U (en) | 2017-07-20 | 2017-07-20 | A kind of current measuring device and system |
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| Country | Link |
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| CN (1) | CN207133352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710046A (en) * | 2018-07-09 | 2018-10-26 | 延锋伟世通电子科技（上海）有限公司 | A kind of onboard instruments durable test device |
-
2017
- 2017-07-20 CN CN201720895932.6U patent/CN207133352U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710046A (en) * | 2018-07-09 | 2018-10-26 | 延锋伟世通电子科技（上海）有限公司 | A kind of onboard instruments durable test device |
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