CN205318160U - Feeder intelligent terminal - Google Patents
Feeder intelligent terminal Download PDFInfo
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- CN205318160U CN205318160U CN201521100109.9U CN201521100109U CN205318160U CN 205318160 U CN205318160 U CN 205318160U CN 201521100109 U CN201521100109 U CN 201521100109U CN 205318160 U CN205318160 U CN 205318160U
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Abstract
The utility model discloses a feeder intelligent terminal, the terminal includes the bus board, a power supply unit, the core is handled and external communication unit, the human -computer interaction unit, switching value input unit, analog quantity acquisition unit and switch quantity output unit, analog quantity acquisition unit includes unipolarity AD sampling bipolarity signal pickup assembly, unipolarity AD sampling bipolarity signal pickup assembly includes the signal changer, sampling resistor, the limiter diode, and a filter capacitor, analog switch, a single -chip microcomputer, singlechip DA output is connected with signal changer common port electricity, singlechip AD input with analog switch electricity is connected, and signal changer, sampling resistor, limiter diode, filter capacitance, analog switch electricity are connected, and the signal noise of having solved the current leading passageway of analog quantity acquisition unit signal system is big, problem that equipment manufacturing cost is high.
Description
Technical field
The utility model relates to distribution automation technical field, in particular a kind of feeder line intelligent terminal.
Background technology
Along with the develop rapidly of singlechip technology, the travelling speed of micro-chip is more and more higher, and integrated function also gets more and more, and is therefore widely used in the electronic information fields such as signals collecting, Industry Control, family be electric. In the signal gathering unit of existing feeder line intelligent terminal; often can use inside and carry A/D (A/D converter) and the micro-chip of D/A (D/A converter); the A/D that micro-chip inside carries is generally unipolarity (signal only forward or backwards); and the signal object gathered mostly is bipolarity signal (just have to reverse signal) simultaneously; therefore use the signal pickup assembly of the inner A/D of micro-chip, need to sample after converting the bipolarity signal of outside to unipolarity signal. Current bipolarity signal converts unipolarity signal to and generally adopts totalizer to realize, and for the signal acquiring system of hyperchannel except increasing except multichannel analog switch, also needs to increase negative electricity source generator, completes the passage bridge to bipolarity signal. The use of totalizer and negative electricity source generator, inevitably adds on the one hand the signal noise of signalling system analog channel, reduces the sampling precision of system and the stability of system and reliability simultaneously, adds equipment cost on the other hand.
Therefore, prior art has yet to be improved and developed.
Practical novel content
The purpose of this utility model is to provide a kind of feeder line intelligent terminal, need to arrange totalizer and negative electricity source generator during to solve the analog acquisition unit sampling bipolarity signal of prior art, add the signal noise of signalling system analog channel, reduce the sampling precision of system and the stability of system and reliability, too increase the problem of device fabrication cost on the other hand.
The technical solution of the utility model is as follows:
A kind of feeder line intelligent terminal, comprise bus board, power subsystem, core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit, described power subsystem, core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit are arranged on the functional unit interface of bus board respectively, wherein
Described analog acquisition unit comprises unipolarity AD sampling bipolarity signal pickup assembly, described unipolarity AD sampling bipolarity signal pickup assembly comprises signal transmitting device, sampling resistance, limiter diode, filter capacitor, analog switch, micro-chip, described micro-chip D/A output terminal is electrically connected with the public end of signal transmitting device, Chip Microcomputer A/D input is electrically connected with described analog switch, described signal transmitting device, sampling resistance, limiter diode, filter capacitor, analog switch electrical connection.
Described feeder line intelligent terminal, wherein, described micro-chip inside carries D/A transmodulator, and the output area of D/A transmodulator is 0---2.4V.
Described feeder line intelligent terminal, wherein, described micro-chip inside carries the unipolarity high-precision a/d converter for gathering unipolarity signal.
Described feeder line intelligent terminal, wherein, described analog switch is unipolarity analog switch.
Described feeder line intelligent terminal, wherein, is equipped with the high precision mutual inductor making analog acquisition avoid calibrating debugging in described analog acquisition unit.
Described feeder line intelligent terminal, wherein, described bus board is integrated with power supply bus, power subsystem is electrically connected with core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit by power supply bus, is that each functional unit provides power supply.
The beneficial effects of the utility model: the utility model is by providing a kind of feeder line intelligent terminal with unipolarity AD sampling bipolarity signal pickup assembly, need to arrange totalizer and negative electricity source generator when solving the analog acquisition unit sampling bipolarity signal of prior art, increase the problem of the signal noise of signalling system analog channel, improve the sampling precision of system and the stability of system and reliability simultaneously, also reduce the manufacturing cost of equipment on the other hand.
Accompanying drawing explanation
Fig. 1 is analog acquisition unit and bus board connection diagram in the utility model.
Fig. 2 is the circuit connection diagram of unipolarity AD sampling bipolarity signal pickup assembly in the utility model.
Fig. 3 is the workflow diagram of unipolarity AD sampling bipolarity signal pickup assembly in the utility model.
Accompanying drawing mark illustrates:
1 signal transmitting device, 2 sampling resistance, 3 limiter diodes, filter capacitor 4, analog switch 5, micro-chips 6
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, clearly, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Consult Fig. 1 and Fig. 2, the utility model provides a kind of feeder line intelligent terminal, comprising bus board, power subsystem, core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit, described power subsystem, core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit are arranged on the functional unit interface of bus board respectively.
Analog acquisition unit function is as follows: gathering 1 road 4-20mA galvanic current, precision reaches 2 ‰;Gathering 1 road 0-60V volts DS, precision reaches 2 ‰; Gathering 9 road 0-6A alternating currents, precision reaches 2 ‰; Gathering 3 road 0-120V voltage of alternating current, precision reaches 2 ‰; Automatic identification bus plate address encodes, by inner double-network communication bus connecting system communication system; Arrange, analyze and the raw data of memory module; Issue data to core processing unit; Accept the data of core processing module; Calculate meritorious and the multiple electricity such as wattless power, power factor, and arrange as raw data stores; Three-step charging, inverse time threshold currents protection (three kinds of curves), two-part zero-sequence current protection, all protections generate SOE event information, and arrange as raw data stores; All Protection parameters all have anti-correction process, and when namely this analog acquisition unit powers on, Protection parameters compares with the corresponding stored data of core processing and external communication unit, if inconsistent, warning reminding; Can realize charged hot-swappable.
When electric current or voltage signal are gathered by analog acquisition unit, the signal object gathered mostly is bipolarity signal (just have to reverse signal), need to sample after converting the bipolarity signal of outside to unipolarity signal (just to signal), for avoiding the use of totalizer and negative electricity source generator to cause the problem that signal noise increases and cost increases of signalling system analog channel, in the present embodiment, described analog acquisition unit also comprises unipolarity AD sampling bipolarity signal pickup assembly, described unipolarity AD samples bipolarity signal pickup assembly for converting bipolarity signal to unipolarity signal, again unipolarity signal is input to the input pin of the A/D converter of micro-chip, realize the A/D to unipolarity signal to sample. described unipolarity AD sampling bipolarity signal pickup assembly comprises signal transmitting device 1, sampling resistance 2, limiter diode 3, filter capacitor 4, analog switch 5, micro-chip 6, the D/A output terminal of described micro-chip 6 is electrically connected with the public end of signal transmitting device 1, the A/D input terminus of micro-chip 6 is electrically connected with described analog switch 5, and described signal transmitting device 1, sampling resistance 2, limiter diode 3, filter capacitor 4, analog switch 5 are electrically connected successively.
Further, described micro-chip 6 inside carries D/A transmodulator, the output area of D/A transmodulator is 0---2.4V, preferably, in the present embodiment, D/A transmodulator exports 1.2V voltage and shakes voltage as the pad of bipolarity signal, utilize the superposition theorem of circuit directly bipolarity signal to be carried out pad to shake, convert bipolarity signal to unipolarity signal. Owing to the conversion scope of A/D converter is 0-2.4V, also be exactly all signal demands being input to A/D converter meet 0-2.4V could be collected, and bipolarity signal is generally symmetrical signal, therefore the mid point that the voltage that shakes is set to AD conversion scope is padded: 1.2V, the lower limit 0V of the conversion scope of A/D converter is reached after padding the Signal averaging of shake voltage and-1.2V, the upper limit 2.4V of the conversion scope of A/D converter is reached after padding shake voltage and 1.2V Signal averaging, like this, the input range of bipolarity signal is-1.2V---1.2V, meets the feature of bipolarity signal symmetry.
Further, described micro-chip 6 inside carries the unipolarity high-precision a/d converter for gathering unipolarity signal, and high-precision a/d converter ensure that the precision and stability of signals collecting.
Further, described analog switch 5 is unipolarity analog switch, after bipolarity signal converts unipolarity signal to, multichannel unipolarity signal carries out passage bridge by analog switch 5, select the passage of sampling, sample from the input pin of the unipolarity signal access micro-chip inside A/D converter that analog switch exports.
Further, in described analog acquisition unit, be equipped with high precision mutual inductor, described high precision mutual inductor make analog acquisition unit obtain analog acquisition avoid calibration debugging.
Further, described bus board is integrated with power supply bus, power subsystem is electrically connected with core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit by power supply bus, is that each functional unit provides power supply.
Preferably, during in order to avoid a certain functional unit to break down, whole distribution automation terminal must be closed, the pull-out maintenance of fault functional unit or could change, the operation of the whole system of serious impact, described core processing and externally communication unit, man-machine interaction unit, On-off signal unit, plug-and-play circuit all it is equipped in analog acquisition unit and switch amount output unit, described plug-and-play circuit is connected with the CPU in each functional unit and power supply bus, like this, when changing a certain fault functional unit, whole distribution automation terminal still can normally be run, the impact of the system fault is reduced to minimum.
Consulting Fig. 3, workflow of the present utility model is as follows:
Converting bipolarity signal to electric current signal by signal transmitting device 1, electric current signal converts voltage signal to by sampling resistance 2; Voltage signal carries out filtering by filter capacitor 4, the interference of suppression and anti-stop signal; Bipolarity signal is carried out pad and shakes by the analog voltage signal exported by the D/A output terminal being connected to the micro-chip 6 of the public end of signal transmitting device 1, and bipolarity signal is converted to unipolarity signal; Multichannel unipolarity signal carries out passage bridge by analog switch 5, selects sampling channel; The input pin of the A/D converter of micro-chip 6 it is input to, it is achieved sampled by the A/D of unipolarity signal from the unipolarity signal of analog switch 5 output.
The utility model is by providing a kind of feeder line intelligent terminal with unipolarity AD sampling bipolarity signal pickup assembly, need to arrange totalizer and negative electricity source generator when solving the analog acquisition unit sampling bipolarity signal of prior art, increase the problem of the signal noise of signalling system analog channel; The utility model simplifies preposition analog channel circuit layout simultaneously, saves circuit cost; Improve analog to digital conversion speed, improve system execution efficiency; Improve the sampling precision of system and the stability of system and reliability.
Should be understood that; application of the present utility model is not limited to above-mentioned citing; for those of ordinary skills, it is possible to improved according to the above description or convert, all these improve and convert the protection domain that all should belong to the utility model claims.
Claims (7)
1. a feeder line intelligent terminal, comprise bus board, power subsystem, core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit, described power subsystem, core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit are arranged on the functional unit interface of bus board respectively, it is characterized in that
Described analog acquisition unit comprises unipolarity AD sampling bipolarity signal pickup assembly, described unipolarity AD sampling bipolarity signal pickup assembly comprises signal transmitting device, sampling resistance, limiter diode, filter capacitor, analog switch, micro-chip, described micro-chip D/A output terminal is electrically connected with the public end of signal transmitting device, Chip Microcomputer A/D input is electrically connected with described analog switch, described signal transmitting device, sampling resistance, limiter diode, filter capacitor, analog switch electrical connection.
2. feeder line intelligent terminal according to claim 1, it is characterised in that, described micro-chip inside carries D/A transmodulator, and the output area of D/A transmodulator is 0---2.4V.
3. feeder line intelligent terminal according to claim 1, it is characterised in that, described micro-chip inside carries the unipolarity high-precision a/d converter for gathering unipolarity signal.
4. feeder line intelligent terminal according to claim 1, it is characterised in that, described analog switch is unipolarity analog switch.
5. feeder line intelligent terminal according to claim 1, it is characterised in that, it is equipped with the high precision mutual inductor making analog acquisition avoid calibrating debugging in described analog acquisition unit.
6. feeder line intelligent terminal according to claim 1, it is characterized in that, described bus board is integrated with power supply bus, power subsystem is electrically connected with core processing and external communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit by power supply bus, is that each functional unit provides power supply.
7. feeder line intelligent terminal according to claim 1, it is characterized in that, all being equipped with plug-and-play circuit in described core processing and externally communication unit, man-machine interaction unit, On-off signal unit, analog acquisition unit and switch amount output unit, described plug-and-play circuit is connected with the CPU in each functional unit and power supply bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100109.9U CN205318160U (en) | 2015-12-22 | 2015-12-22 | Feeder intelligent terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100109.9U CN205318160U (en) | 2015-12-22 | 2015-12-22 | Feeder intelligent terminal |
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| Publication Number | Publication Date |
|---|---|
| CN205318160U true CN205318160U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521100109.9U Withdrawn - After Issue CN205318160U (en) | 2015-12-22 | 2015-12-22 | Feeder intelligent terminal |
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| Country | Link |
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| CN (1) | CN205318160U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388814A (en) * | 2015-12-22 | 2016-03-09 | 佛山市科瑞德电气科技有限公司 | Feed line intelligent terminal and sampling method of sampling bipolarity signal by unipolarity AD |
-
2015
- 2015-12-22 CN CN201521100109.9U patent/CN205318160U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388814A (en) * | 2015-12-22 | 2016-03-09 | 佛山市科瑞德电气科技有限公司 | Feed line intelligent terminal and sampling method of sampling bipolarity signal by unipolarity AD |
| CN105388814B (en) * | 2015-12-22 | 2018-02-06 | 广东科瑞德电气科技有限公司 | A kind of method of sampling of feeder line intelligent terminal and unipolarity AD sampling bipolar signal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160615 Effective date of abandoning: 20180206 |