CN206193096U - Direct current fills electric pile ripple measuring device - Google Patents
Direct current fills electric pile ripple measuring device Download PDFInfo
- Publication number
- CN206193096U CN206193096U CN201621136927.9U CN201621136927U CN206193096U CN 206193096 U CN206193096 U CN 206193096U CN 201621136927 U CN201621136927 U CN 201621136927U CN 206193096 U CN206193096 U CN 206193096U
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- Prior art keywords
- ripple
- direct
- measurement apparatus
- current charging
- charging post
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Abstract
The utility model provides a direct current fills electric pile ripple measuring device, relates to and fills electric pile and detect technical field, including load module, AD converter, controller, the load module with fill electric pile and charge the end electricity and is connected, still be equipped with the ripple differential of ripple differential sampling module on the load module and become the square wave, the AD converter becomes the digital quantity to the square wave more to be transmitted and handles for the controller. Compared with the prior art the utility model discloses becoming square wave (the voltage of square wave equals) with the peak voltage of ripple with the ripple differential earlier, sending the square wave into the sampling of AD converter again, the AD converter has sufficient sample rate and gathers peak voltage like this, the condition that peak voltage also can not appear leaking simultaneously, and the ripple coefficient who consequently finally calculates is more accurate.
Description
Technical field
The utility model is related to charging pile detection technique field, more particularly to a kind of direct-current charging post ripple measurement dress
Put.
Background technology
In direct-current charging post, alternating current is changed into rectification circuit the direct current of pulsation, then circuit after filtering, is filtered big
Part alternating component, but wherein still some alternating component, referred to as this pulsation alternating component, ripple 1.Ripple 1 endanger compared with
Greatly, it will usually influence power supply delivery efficiency, or even or produce surge voltage or electric current to burn out equipment, therefore in the inspection of charging pile performance
Ripple 1 is an important parameter in survey.Existing ripple detecting instrument tests ripple and Current Voltage using conventional oscilloscope method
Deng electrical parameter, wherein acquisition means are mainly acquired by A/D converter to ripple signal, but because A/D converter is adopted
Sample rate is limited, and adjacent sampled point has certain intervals in time so that A/D converter is easy to leak through when sampling
The peak point of ripple, such as shown in Fig. 1, just leaked through the peak point 2 of ripple 1 between sampled point 3 and sampled point 4, and ripple system
Several result of calculation is closely related with the peak point 2 of ripple 1, and the peak point 2 of ripple 1 is leaked through when sampling, and this is allowed for most
There is larger error in the ripple factor for calculating eventually.
The content of the invention
The purpose of this utility model is to solve weak point of the prior art, there is provided a kind of direct-current charging post ripple is surveyed
Amount device so that the final ripple factor for calculating is more accurate.
The purpose of this utility model is achieved through the following technical solutions：
A kind of direct-current charging post ripple measurement apparatus, including load blocks, A/D converter, controller, load blocks are provided
Electrically connected with charging pile charging end, also including ripple derivative sampling module, ripple derivative sampling module is the line in load blocks
The rectangular ripple of ripple differential, A/D converter is changed into square wave digital quantity and is transferred to controller to be processed again.
Wherein, the ripple derivative sampling module includes operational amplifier, and operational amplifier output terminal is respectively through feedback electricity
Hold and feedback resistance electrically connects operational amplifier reverse input end, operational amplifier positive input resistance grounded.
Wherein, the ripple derivative sampling module is provided with filter unit, the first filtered unit of the analog voltage of load blocks
After filtering differential is carried out in feeding operational amplifier.
Wherein, the filter unit is high-pass filtering circuit.
Wherein, the ripple derivative sampling module be provided with the square wave after operational amplifier differential be amplified it is linear
Amplifying circuit.
Wherein, also, when direct-current charging post ripple measurement apparatus are not connected to PC ends, voluntarily stored including memory module
Ripple information after A/D converter treatment.
Wherein, the memory module includes pin-saving chip, and pin-saving chip is used to receive the data input of data
Pin and pull-up resistor is circumscribed with respectively for receiving the clock input pin of clock signal, the power input pin of pin-saving chip connects
To power end simultaneously through capacity earth.
Wherein, also including communication module, communication module is through RS232 interfaces the data forwarding of controller to PC ends.
Wherein, also including display module, for the data after display controller treatment.
Wherein, also including alarm module, when predetermined threshold value of the ripple voltage more than controller, controller starts alarm mould
Block is alarmed.
The beneficial effects of the utility model：
A kind of direct-current charging post ripple measurement apparatus of the present utility model, by ripple derivative sampling module load blocks
On the rectangular ripple of ripple differential, A/D converter is changed into square wave digital quantity and is transferred to controller to be processed again.With it is existing
There is technology compared to the utility model first by the rectangular ripple of ripple differential（The voltage of square wave is equal with the crest voltage of ripple）, then
Just there are enough sample rates to collect crest voltage square wave feeding A/D converter sampling, such A/D converter, while
The situation for leaking through crest voltage can not possibly occur, therefore the final ripple factor for calculating is more accurate.
Brief description of the drawings
Utility model is described further using accompanying drawing, but embodiment in accompanying drawing is not constituted to of the present utility model
What is limited, for one of ordinary skill in the art, on the premise of not paying creative work, can also be according to the following drawings
Obtain other accompanying drawings.
Fig. 1 is the demonstration graph of the peak point that A/D converter sampling leaks through ripple.
Fig. 2 is a kind of system block diagram of direct-current charging post ripple measurement apparatus of the present utility model.
Fig. 3 is a kind of system frame of the ripple derivative sampling module of direct-current charging post ripple measurement apparatus of the present utility model
Figure.
Fig. 4 is a kind of circuit diagram of the memory module of direct-current charging post ripple measurement apparatus of the present utility model.
Specific embodiment
A kind of direct-current charging post ripple measurement apparatus as shown in Figure 2, by load blocks 12, ripple derivative sampling module
13rd, A/D converter 14, controller 15, memory module 18, display module 19, alarm module 17 and communication module 16 are constituted, load
Module 12 is electrically connected with the charging end of charging pile 11, and ripple derivative sampling module 13 is rectangular the ripple differential in load blocks 12
Ripple, A/D converter 14 is changed into square wave digital quantity and is transferred to controller 15 to be analyzed treatment again, is being shown respectively
The operation such as show, alarm, store and communicate.
Specifically, with reference to Fig. 3,13 points of ripple derivative sampling module be high-pass filtering circuit 131, operational amplification circuit 132,
The part of linear amplifier circuit 133 3, the analog voltage being connected in the load blocks 12 of the output end of charging pile 11 is admitted to filtering
Unit（Specially high-pass filtering circuit 131）Differential is carried out in feeding operational amplification circuit 132 after filtering, so that analog voltage
Become square wave and be amplified through sending into linear amplifier circuit 133, the square wave after being exaggerated is converted to through A/D converter 14 again
Digital quantity, is then transferred to controller 15 and is processed.Wherein, operational amplification circuit 132 is mainly made up of operational amplifier, fortune
Amplifier out is calculated respectively through feedback capacity and feedback resistance electrical connection operational amplifier reverse input end, and operational amplifier is just
To input resistance grounded.Controller 15 sets line respectively previously according to national standard and the various performance parameters of charging pile 11
The threshold value of wave voltage and ripple factor, then the digital quantity transmitted through A/D converter 14 is analyzed and transported by existing algorithm
Calculate, and the parameters such as ripple voltage and ripple factor are included on display module 19 in real time.If the ripple voltage for detecting and
There is a predetermined threshold value exceeded corresponding to it in ripple factor（Overvoltage, excessively stream）When, display module 19 can show warning font,
Controller 15 starts alarm module 17 and is alarmed.Carried out by program set in advance automatically by software in test, realized
Full-automatic identification detection, so as to eliminate influence of the human factor to testing result, makes testing result more efficiently, accurately.
With reference to Fig. 4, to avoid being manually entered data, operating efficiency is improved, the present apparatus is additionally provided with memory module 18, in this dress
Put and be not connected to PC ends（Unit state）When, controller 15 enables memory module 18, memory module 18 is voluntarily stored most
Ripple information after many 50 groups of A/D converters 14 treatment.Wherein memory module 18 includes pin-saving chip, data storage core
Piece is used to receive the data input pin of data and is circumscribed with pull-up resistor respectively for receiving the clock input pin of clock signal, number
Power end is connected to simultaneously through capacity earth according to the power input pin of storage chip.The present apparatus is additionally provided with communication module 16, and communicate mould
Block 16, the data forwarding of controller 15 to PC ends, so as to carry out the transmission of data, realizes the guarantor to data through RS232 interfaces
Other treatment work such as deposit, edit, printing.
In order that direct-current charging post ripple measurement apparatus can be tested flexibly, load blocks 12 are built-in with regulating current device,
So as to realize that electric current is adjustable in the scope of 0-10A.In order to improve the test speed of direct-current charging post ripple measurement apparatus, using height
The FPGA of speed is used as controller 15.
The utility model is first by the rectangular ripple of ripple differential compared with prior art（The voltage of square wave and the peak value of ripple
Voltage is equal）, then square wave feeding A/D converter 14 is sampled, such A/D converter 14 just has enough sample rates to collect
Crest voltage, while it is also impossible to the situation for leaking through crest voltage occur, therefore the final ripple factor for calculating is more accurate.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of scope is protected, although being explained to the present invention with reference to preferred embodiment, one of ordinary skill in the art should
Work as understanding, technical scheme can be modified or equivalent, without deviating from the reality of technical solution of the present invention
Matter and scope.
Claims (10)
1. a kind of direct-current charging post ripple measurement apparatus, including load blocks, A/D converter, controller, load blocks with charge
The electrical connection of stake charging end, it is characterised in that：Also include ripple derivative sampling module, ripple derivative sampling module is in load blocks
The rectangular ripple of ripple differential, A/D converter is changed into square wave digital quantity and is transferred to controller to be processed again.
2. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 1, it is characterised in that：The ripple derivative sampling
Module includes operational amplifier, and operational amplifier output terminal is anti-through feedback capacity and feedback resistance electrical connection operational amplifier respectively
To input, operational amplifier positive input resistance grounded.
3. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 2, it is characterised in that：The ripple derivative sampling
Module is provided with filter unit, and the analog voltage of load blocks first carries out after filtered unit filtering micro- in feeding operational amplifier
Point.
4. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 3, it is characterised in that：The filter unit is height
Bandpass filter circuit.
5. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 2, it is characterised in that：The ripple derivative sampling
Module is provided with the linear amplifier circuit that the square wave after operational amplifier differential is amplified.
6. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 1, it is characterised in that：Also include memory module,
When direct-current charging post ripple measurement apparatus are not connected to PC ends, the ripple information after A/D converter treatment is voluntarily stored.
7. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 6, it is characterised in that：The memory module includes
Pin-saving chip, pin-saving chip is used to receive the data input pin of data and is input into for receiving the clock of clock signal
Pin is circumscribed with pull-up resistor respectively, and the power input pin of pin-saving chip is connected to power end simultaneously through capacity earth.
8. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 1, it is characterised in that：Also include communication module,
Communication module is through RS232 interfaces the data forwarding of controller to PC ends.
9. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 1, it is characterised in that：Also include display module,
For the data after display controller treatment.
10. a kind of direct-current charging post ripple measurement apparatus as claimed in claim 1, it is characterised in that：Also include alarm module,
When predetermined threshold value of the ripple voltage more than controller, controller starts alarm module and is alarmed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621136927.9U CN206193096U (en) | 2016-10-19 | 2016-10-19 | Direct current fills electric pile ripple measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621136927.9U CN206193096U (en) | 2016-10-19 | 2016-10-19 | Direct current fills electric pile ripple measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206193096U true CN206193096U (en) | 2017-05-24 |
Family
ID=58731590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621136927.9U Expired - Fee Related CN206193096U (en) | 2016-10-19 | 2016-10-19 | Direct current fills electric pile ripple measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206193096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783062A (en) * | 2017-11-27 | 2018-03-09 | 厦门亿联网络技术股份有限公司 | A kind of ripple determiner |
-
2016
- 2016-10-19 CN CN201621136927.9U patent/CN206193096U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107783062A (en) * | 2017-11-27 | 2018-03-09 | 厦门亿联网络技术股份有限公司 | A kind of ripple determiner |
| CN107783062B (en) * | 2017-11-27 | 2024-03-12 | 厦门亿联网络技术股份有限公司 | Ripple detection device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20201019 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |