CN109444619A - Direct current current divider detection system - Google Patents
Direct current current divider detection system Download PDFInfo
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- CN109444619A CN109444619A CN201811639874.6A CN201811639874A CN109444619A CN 109444619 A CN109444619 A CN 109444619A CN 201811639874 A CN201811639874 A CN 201811639874A CN 109444619 A CN109444619 A CN 109444619A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The present invention is suitable for current divider detection technique field, provides a kind of direct current current divider detection system, comprising: DC comparator, DC current source, multiple check bits, multiple application condition instrument and terminal device；Multiple check bits are for installing multiple tested current dividers；Terminal device is for sending test instruction to DC current source；DC current source is used to output current to DC comparator and multiple tested current dividers according to test instruction；Multiple application condition instrument and multiple check bits correspond, for detecting the voltage value of DC comparator and the voltage value of corresponding tested current divider, and the voltage value of the voltage value and corresponding tested current divider to DC comparator carries out error calculation, generates error calculation result and is sent to the terminal device；Terminal device display error calculated result.The present invention is connected multiple tested current dividers with DC current source by multiple check bits, be can be achieved at the same time the detection of multiple tested current dividers, is greatly improved the detection efficiency of current divider.
Description
Technical field
The invention belongs to current divider detection technique field more particularly to a kind of direct current current divider detection systems.
Background technique
With the rapid development of social economy and new technology, especially electric vehicle engineering is advanced by leaps and bounds in recent years, directly
Stream current divider is applied to more and more widely in such as electric automobile charging pile low voltage electrical equipment, obtains in the every field of society
Extensive infiltration is arrived.Due to direct current current divider be related to trade settlement, in terms of application be increasingly enhanced, to direct current
Current divider is examined and determine, the metering requirements calibrated and the requirement detected to other indexs are also following.
The working principle of current divider is to pass through the voltage that the both ends resistance Shi Qi generate according to electric current, reaches and expands instrument survey
Measure the purpose of current range.The characteristics of current divider, is: resistance value very little.Different production firms, different designs type currently on the market
Number current divider appearance characteristics and device performance be not quite similar, these all bring certain difficulty to the calibrating of current divider.It is existing
There is no unified standards for the direct current current divider detection device in stage, and detection efficiency is low.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of direct current current divider detection system, it is straight in the prior art to solve
Flow the low problem of current divider detection efficiency.
The embodiment of the invention provides a kind of direct current current divider detection systems, comprising: DC comparator, DC current source,
Multiple check bits, multiple application condition instrument and terminal device；
The multiple check bit is for installing multiple tested current dividers；
The terminal device is for sending test instruction to the DC current source；
The DC current source, which is used to be instructed according to the test, outputs current to the DC comparator and the multiple
Tested current divider；
The multiple application condition instrument and the multiple check bit correspond, for detecting the electricity of the DC comparator
The voltage value of pressure value and corresponding tested current divider, and voltage value to the DC comparator and corresponding tested current divider
Voltage value carries out error calculation, generates error calculation result and is sent to the terminal device；
The terminal device is for showing the error calculation result.
In one embodiment, the DC current source includes that signal source module, pulse modulation module and high current occur
Device；
The signal source module is for issuing small voltage signal；
The pulse modulation module is used to carry out impulse modulation to the small voltage signal, generates first voltage signal, and
The first voltage signal is exported to the strong current generator；
The strong current generator is used to generate high current according to the first voltage signal, and by the High-current output
To the tested current divider and the DC comparator.
In one embodiment, the DC comparator includes measuring resistance；
The electric current generation voltage signal that the measuring resistance is used to export according to the DC current source, and by the voltage
Signal is exported to the pulse modulation module of corresponding application condition instrument and the DC current source, the pulse modulation module according to
The voltage signal of the small voltage signal and measuring resistance feedback, generates second voltage signal, and by the second voltage
Signal is sent to the strong current generator.
In one embodiment, the DC comparator further includes current ratio conversion module:
The current ratio conversion module is used to the electric current that the DC current source provides being converted to standard testing electric current,
And the standard testing electric current is exported to the measuring resistance.
In one embodiment, the terminal device is used to obtain the Devices to test parameter of user's input, and according to described
Devices to test parameter generates test instruction.
In one embodiment, the terminal device be used for according to device parameter to be tested and the error calculation as a result,
It generates and shows search report.
In one embodiment, the system also includes cabinet body, the DC comparator, the DC current source and multiple
Application condition instrument is respectively arranged on the interior of the cabinet.
In one embodiment, the check bit includes current input terminal and current divider mounting seat；
The current input terminal is for connecting the DC current source and the tested current divider；
The current divider mounting seat is set to the cabinet body surface, for installing the tested current divider.
In one embodiment, the current input terminal includes left terminal and right hand terminal, under the left terminal
Side is equipped with slideway, and the slideway is for making the relatively described right hand terminal of the left terminal make left and right horizontal sliding.
In one embodiment, the application condition instrument and the terminal device are established by RS485 bus communicates to connect.
Existing beneficial effect is the embodiment of the present invention compared with prior art: the embodiment of the invention provides a kind of direct currents
Current divider detection system, comprising: DC comparator, DC current source, multiple check bits, multiple application condition instrument and terminal are set
It is standby；The multiple check bit is for installing multiple tested current dividers；The terminal device is instructed for sending test to described straight
Flow current source；The DC current source, which is used to be instructed according to the test, outputs current to the DC comparator and the multiple
Tested current divider；The multiple application condition instrument and the multiple check bit correspond, for detecting the DC comparator
Voltage value and corresponding tested current divider voltage value, and voltage value and corresponding tested shunting to the DC comparator
The voltage value of device carries out error calculation, generates error calculation result and is sent to the terminal device；The terminal device is used for
Show the error calculation result.The embodiment of the present invention is connected multiple tested current dividers and DC current source by multiple check bits
It connects, can be achieved at the same time the detection of multiple tested current dividers, greatly improve the detection efficiency of current divider.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram of direct current current divider detection system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of direct current current divider detection system provided in an embodiment of the present invention；
Fig. 3 is the data statistics interface schematic diagram of terminal device provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
Description and claims of this specification and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Embodiment 1:
Fig. 1 shows a kind of structural schematic diagram of direct current current divider detection system 1 provided by one embodiment of the invention,
Include:
DC comparator 10, DC current source 20, multiple check bits, multiple application condition instrument 30 and terminal device 40；
The multiple check bit is for installing multiple tested current dividers 50；
The terminal device 40 is for sending test instruction to the DC current source 20；
The DC current source 20, which is used to be instructed according to the test, outputs current to the DC comparator 10 and described
Multiple tested current dividers 50；
The multiple application condition instrument 30 is corresponded with the multiple check bit, for detecting the DC comparator 10
Voltage value and corresponding tested current divider 50 voltage value, and voltage value to the DC comparator 10 and corresponding tested
The voltage value of current divider 50 carries out error calculation, generates error calculation result and is sent to the terminal device 40；
The terminal device 40 is for showing the error calculation result.
In the present embodiment, Fig. 1 illustrates only the structure connection diagram of the corresponding system of a check bit.
In the present embodiment, DC current source 20 is that DC comparator 10 and multiple tested current dividers 50 provide electric current, directly
Current source 20, DC comparator 10 and multiple tested current dividers 50 is flowed to be connected in series；Application condition instrument 30 is respectively compared with direct current
Instrument 10 and tested current divider 50 are connected in parallel, for detecting 50 both ends of voltage value and tested current divider at 10 both ends of DC comparator
Voltage value.
In the present embodiment, each check bit can install a tested current divider 50, and each check bit is also one corresponding
Application condition instrument 30, application condition instrument 30 are used to detect the voltage value and DC comparator 10 of the tested current divider 50 of the check bit
Voltage value.
In the present embodiment, application condition instrument 30 uses intelligent digital application condition instrument, accessory power supply power supply, two channels electricity
Input circuit independent design is pressed, two-way small voltage signal measurement can be carried out simultaneously, it, can be in turn using 8 Digital sum pipe display modes
Show the measured value in two channels.The utilization of application condition instrument 30 is small in size, and light-weight, the high feature of measurement accuracy may be implemented small
The voltage measurement of signal.
In the present embodiment, two channels of application condition instrument 30 connect with tested current divider 50 and DC comparator 10 respectively
It connects, two channels are respectively used to check the voltage value of tested current divider 50 and the voltage value of DC comparator 10.
It in the present embodiment, is guarantee device performance, the indices of application condition instrument 30 are as follows: accuracy of measurement 0.02
Grade；Voltage measurement range is direct current 0V-10V；2 Measurement channels；Figure place showing is 7；Display minimum resolution is 1 μ V；It surveys
Amount minimum resolution is 0.001 μ V；Communication interface is 485 communication interfaces；Power supply is AC220V ± 15%, working environment
It is 0 DEG C~40 DEG C of temperature, humidity≤85%.
In the present embodiment, it is guarantee device performance, the associated technical parameters of DC current source 20 should meet:
1) have more current output journeys: range 1:0-500A；(maximum 600A)；
Range 2:0-50A；(maximum 60A)；
Range 3:0-5A；(maximum 6A)；
Range 4:0-0.5A；(maximum 0.6A)；
2) electric current output accuracy is≤± 0.02%；Electric current output stability is≤± 0.01%/30min；Output electricity
Pressure is less than or equal to 3V；Working power is direct current 220V, frequency 50Hz.
Direct current current divider detection system provided by the above embodiment, comprising: DC comparator 10, DC current source 20, more
A check bit, multiple application condition instrument 30 and terminal device 40；The multiple check bit is for installing multiple tested current dividers 50；
The terminal device 40 is for sending test instruction to the DC current source 20；The DC current source 20 is used for according to
Test instruction outputs current to the DC comparator 10 and the multiple tested current divider 50；The multiple application condition instrument 30
It is corresponded with the multiple check bit, for detecting the voltage value and corresponding tested current divider 50 of the DC comparator 10
Voltage value, and the voltage value and corresponding tested current divider 50 to the DC comparator 10 voltage value carry out error meter
It calculates, generate error calculation result and is sent to the terminal device 40；The terminal device 40 is for showing the error calculation
As a result.The embodiment of the present invention is connected multiple tested current dividers 50 and DC current source 20 by multiple check bits, can be simultaneously
The detection for realizing multiple tested current dividers 50, greatly improves the detection efficiency of current divider.
As shown in Fig. 2, Fig. 2 shows the structural schematic diagrams of direct current current divider detection system 1.In one embodiment, institute
Stating DC current source 20 includes signal source module 21, pulse modulation module 22 and strong current generator 23；
The signal source module 21 is for issuing small voltage signal；
The pulse modulation module 22 is used to carry out impulse modulation to the small voltage signal, generates first voltage signal,
And the first voltage signal is exported to the strong current generator 23；
The strong current generator 23 is used to generate high current according to the first voltage signal, and the high current is defeated
Out to the tested current divider 50 and the DC comparator 10.
In the present embodiment, DC current source 20 includes that signal source module 21, pulse modulation module 22 and high current occur
Device 23, signal source module 21 are connect with pulse modulation module 22, and pulse modulation module 22 is connect with strong current generator 23.Its
In, DC current source 20 uses pulse modulation technique, and strong current generator 23 uses classical constant-current circuit, strong current generator 23
In high-power COMS power tube can produce 600A high current.
In one embodiment, DC comparator includes measuring resistance；
The electric current generation voltage signal that the measuring resistance is used to export according to the DC current source, and by the voltage
Signal is exported to the pulse modulation module of corresponding application condition instrument and the DC current source, the pulse modulation module according to
The voltage signal of the small voltage signal and measuring resistance feedback, generates second voltage signal, and by the second voltage
Signal is sent to the strong current generator.
In one embodiment, DC comparator further includes current ratio conversion module:
The current ratio conversion module is used to the electric current that the DC current source provides being converted to standard testing electric current,
And the standard testing electric current is exported to the measuring resistance.
In the present embodiment, use DC comparator 10 as feedback components, DC comparator 10 passes through current ratio
Conversion module converts the current ratio that DC current source 20 exports, and the standard testing electric current Jing Guo transformation of scale is exported to mark
Quasi- resistance.
In the present embodiment, measuring resistance is the resistance of a fixed resistance value, is made directly by current ratio conversion module
The electric current that stream current source 20 exports is converted to standard testing electric current, can obtain voltage signal, and electricity in standard resistor at two terminals
The value of signal is pressed to need to be equal to the nominal voltage of tested current divider 50.So as to 10 Plays resistance two of DC comparator
The signal of end output is compared with the voltage at tested 50 both ends of current divider, obtains the error calculation result of tested current divider 50.
In the present embodiment, after measuring resistance gets standard measuring signal, voltage signal is generated at its both ends, by standard
The voltage signal at resistance both ends is sent to the pulse modulation module of DC current source 20 as voltage signal, to make DC current
Source 20 forms feedback regulation, and the electric current for exporting DC current source 20 reaches test request.For example, due to standard resistor at two terminals electricity
Pressure need to be identical as the desired voltage of tested current divider 50, it should be 75mV, when the current value that DC current source 20 exports is 300A
When, and standard resistor at two terminals voltage only has 60mV, then illustrates that current source does not rise to 300A, so that it is defeated to enable DC current source 20 adjust
Out.Stablize the output of DC current source 20, accurate electric current.
In the present embodiment, by magnetic modulator and profound and negative feedbck Control System Design DC comparator 10, make its tool
The feature that proportional precision is high, stability and the linearity are good；Its current ratio conversion module shares 1:10 (6A), 1:100
(60A), three ratios of 1:1000 (600A), plurality of voltages output, application range are more extensive.
To guarantee that device performance, the associated technical parameters of DC comparator 10 should meet: output voltage precision is less than or equal to 1
×10-4；, the linearity is≤1 × 10-4,≤3 μ AT of current ratio conversion module magnetic noise needs；Current ratio conversion module is maximum
Input current need≤600A；Current ratio conversion module maximum output voltage need≤6V.
In one embodiment, the terminal device 40 is used to obtain the Devices to test parameter of user's input, and according to institute
It states Devices to test parameter and generates test instruction.
In the present embodiment, device parameter to be tested includes the tested number of current divider 50, bar code and model.Terminal device
It include the corresponding relationship of device parameter to be tested and current value, the corresponding test electric current of tested current divider 50 of each model in 40
Value is different, includes current value in test instruction, and test instruction is sent to DC current source 20, keeps DC current source 20 defeated
The electric current of current value size in instruction is tested out.
In one embodiment, the terminal device 40 is used for according to device parameter to be tested and the error calculation knot
Fruit generates and shows search report.
In the present embodiment, search report includes the tested device parameter to be tested of current divider 50, the voltage of current divider, electricity
Stream and error.
In the present embodiment, terminal device 40 can also realize storage and the statistical function of detection data.Terminal device 40
Original record can be exported, record number range, qualification and unqualified record etc. can be also according to circumstances selected；It is provided simultaneously with and provides automatically
Document format or table format may be selected according to user demand in the function of examining report.
In the present embodiment, terminal device 40 data statistics interface as shown in Fig. 2, current divider model, grade, voltage,
The details of the parameters such as electric current, qualification rate can be shown by way of table, while right side can show the pie of different parameters
Figure, convenient for intuitive statistics.
In one embodiment, the system also includes cabinet body, the DC comparators 10,20 and of the DC current source
Multiple application condition instrument 30 are respectively arranged on the interior of the cabinet.
In one embodiment, the check bit includes current input terminal and current divider mounting seat；
The current input terminal is for connecting the DC current source 20 and the tested current divider 50；
The current divider mounting seat is set to the cabinet body surface, for installing the tested current divider 50.
In the present embodiment, check bit includes current input terminal and current divider mounting seat.
In one embodiment, the current input terminal includes left terminal and right hand terminal, under the left terminal
Side is equipped with slideway, and the slideway is for making the relatively described right hand terminal of the left terminal make left and right horizontal sliding.
In the present embodiment, left terminal and right hand terminal are separately connected tested current divider 50, specifically, if left terminal
For anode, then left terminal can connect the output end of DC current source and the anode of tested current divider, and right hand terminal connects quilt
The cathode of current divider is surveyed, right hand terminal is connect in inside with DC comparator, and DC comparator is connect with DC current source, is formed
One concatenated circuit.
In the present embodiment, when detecting multiple tested current dividers, the circuit connecting relation being tested between current divider is string
Connection connection.
In the present embodiment, since the current divider appearance of different manufacturers, different model is not quite similar, to adapt to different peaces
Size is filled, current divider mounting seat uses the design based on slideway, structure specifically:
Left terminal and right hand terminal are respectively arranged in current divider mounting seat, and slideway is housed below left terminal, can phase
Left and right is done for right hand terminal to move in parallel, and become the length between left terminal and right hand terminal can freely in a certain range
Change, so as to take into account the current divider of different length, expands measurable range.
It in the present embodiment, can be by vacant check bit when the number of tested current divider 50 that need to be verified is less than detection digit
It is shorted with the Special short piece of outfit, the normal wiring of other check bits, to flexibly grasp current divider amount detection.
In one embodiment, the application condition instrument 30 is communicated with the terminal device 40 by the foundation of RS485 bus
Connection.
In the present embodiment, terminal device 40, which can also be realized, examines item setup and preservation, tested 50 parameter of current divider
Setting, common parameter setting, detection scheme selects and the functions such as output valve is shown.
From above-described embodiment it is found that direct current current divider detection system 1 uses more check bit independent designs, it is more that detection can be synchronized
Block current divider, each check bit are equipped with application condition instrument 30, can measure 10 signal of DC comparator and current divider signal simultaneously,
Application condition instrument 30 uses RS485 bus communication technology, can carry out real-time communication with terminal device 40.The shunting of each check bit
Device mounting seat uses the design based on sliding rail, is applicable to the installation dimension of different size current divider.
Module or unit in system of the embodiment of the present invention can be combined, divided and deleted according to actual needs.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of direct current current divider detection system characterized by comprising DC comparator, DC current source, multiple detections
Position, multiple application condition instrument and terminal device；
The multiple check bit is for installing multiple tested current dividers；
The terminal device is for sending test instruction to the DC current source；
The DC current source be used for according to the test instruction output current to the DC comparator and it is the multiple be tested
Current divider；
The multiple application condition instrument and the multiple check bit correspond, for detecting the voltage value of the DC comparator
With the voltage value of corresponding tested current divider, and the voltage of the voltage value and corresponding tested current divider to the DC comparator
Value carries out error calculation, generates error calculation result and is sent to the terminal device；
The terminal device is for showing the error calculation result.
2. direct current current divider detection system as described in claim 1, which is characterized in that the DC current source includes signal source
Module, pulse modulation module and strong current generator；
The signal source module is for issuing small voltage signal；
The pulse modulation module is used to carry out impulse modulation to the small voltage signal, generates first voltage signal, and by institute
First voltage signal is stated to export to the strong current generator；
The strong current generator is used to generate high current according to the first voltage signal, and by the High-current output to institute
State tested current divider and the DC comparator.
3. direct current current divider detection system as claimed in claim 2, which is characterized in that the DC comparator includes standard electric
Resistance；
The electric current generation voltage signal that the measuring resistance is used to export according to the DC current source, and by the voltage signal
It exports to the pulse modulation module of corresponding application condition instrument and the DC current source, the pulse modulation module is according to
The voltage signal of small voltage signal and measuring resistance feedback, generates second voltage signal, and by the second voltage signal
It is sent to the strong current generator.
4. direct current current divider detection system as claimed in claim 3, which is characterized in that the DC comparator further includes electric current
Ratio conversion module:
The current ratio conversion module is used to be converted in the electric current that the DC current source provides standard testing electric current, and will
The standard testing electric current is exported to the measuring resistance.
5. direct current current divider detection system as described in claim 1, which is characterized in that the terminal device is for obtaining user
The Devices to test parameter of input, and test instruction is generated according to the Devices to test parameter.
6. direct current current divider detection system as described in claim 1, which is characterized in that the terminal device is used for according to be measured
Device parameter and the error calculation are tried as a result, generating and showing search report.
7. direct current current divider detection system as described in claim 1, which is characterized in that the system also includes cabinet bodies, described
DC comparator, the DC current source and multiple application condition instrument are respectively arranged on the interior of the cabinet.
8. direct current current divider detection system as described in any one of claim 1 to 7, which is characterized in that the check bit includes
Current input terminal and current divider mounting seat；
The current input terminal is for connecting the DC current source and the tested current divider；
The current divider mounting seat is set to the cabinet body surface, for installing the tested current divider.
9. direct current current divider detection system as claimed in claim 8, which is characterized in that the current input terminal includes left side
Terminal and right hand terminal, the left terminal lower section are equipped with slideway, and the slideway is for making the relatively described right side of the left terminal
Side terminal makees left and right horizontal sliding.
10. direct current current divider detection system as described in claim 1, which is characterized in that the application condition instrument and the end
End equipment establishes communication connection by RS485 bus.
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