CN202794286U - Linear optocoupler high-frequency direct-current measuring device used for electric power fault recorder - Google Patents
Linear optocoupler high-frequency direct-current measuring device used for electric power fault recorder Download PDFInfo
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- CN202794286U CN202794286U CN 201220477638 CN201220477638U CN202794286U CN 202794286 U CN202794286 U CN 202794286U CN 201220477638 CN201220477638 CN 201220477638 CN 201220477638 U CN201220477638 U CN 201220477638U CN 202794286 U CN202794286 U CN 202794286U
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- linear optocoupler
- optical coupling
- linear optical
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- frequency direct
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Abstract
The utility model relates to the technical field of secondary equipment in electric power system, in particular to a linear optocoupler high-frequency direct-current measuring device used for an electric power fault recorder. The device comprises an analog signal converter, an AD (Analog to Digital) chip and a CPU (Central Processing Unit) and further comprises a linear optocoupler, wherein the analog signal converter is connected with the linear optocoupler through a data wire; the linear optocoupler is connected with the AD chip through a data wire; the AD chip is connected with the CPU through a data wire; and the type of the linear optocoupler is HNCR201. When the device is used, a Hall device and an isolation transformer are replaced by the linear optocoupler, and the requirement of customers for relevant accuracy of high-frequency direct-current can be met without changing the original circuit; and simultaneously, the volume of the device is reduced, the manufacturing cost is relatively low, and the competitive strength of product can be improved. The linear optocoupler high-frequency direct-current measuring device used for the electric power fault recorder has the advantages of being simple in structure, reasonable in setting, low in manufacturing cost, and the like.
Description
Technical field
The utility model relates to the secondary equipment in power system technical field, particularly a kind of linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple.
Background technology
In secondary equipment in power system, the high-frequency signal amount has voltage, the magnitude of current, and range ability separately is different, such as measuring generator rotor d. c. voltage signal (high to several kilovolts), rotor dc current signal (milliampere level signal or millivolt level signal); The occasion of using is more various, corresponding work under bad environment; For the noise the scene not collects measuring system, simultaneously for the light current circuit of inside not by the external signal punch through damage etc., must carry out electric upper isolation and satisfy certain accuracy requirement measured signal and metering circuit so.What a lot of producers of Present Domestic used is Hall element or isolated amplifier.
Traditional Hall element is larger at the small-signal time error, and exports easy temperature influence, and the linearity is relatively poor, many times can not satisfy the requirement that the client uses, need to select different models in different use occasions, dirigibility is extremely low, use trouble, and price is more expensive; Use isolated amplifier, AD202/AD204 for example, from direct current to a few K frequency ranges in precision high, the linearity is good, but the voltage-frequency conversion is carried out first in this isolating device inside, the AC signal that produces is carried out transformer isolation, then carry out frequency-voltage transitions and obtain isolation effect, internal circuit is complicated, reliability is lower, volume is large, and cost is high, is not suitable for large-scale application.
So be necessary existing detection architecture is carried out further technical renovation.
The utility model content
The purpose of this utility model is for the defective of prior art and deficiency, provide a kind of simple in structure, reasonable in design, flexibly, high reliability and high-precision linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple described in the utility model, comprise analog signal converter, AD chip and CPU, it also comprises linear optical coupling, described analog signal converter is connecting linear optical coupling by data line, described linear optical coupling is connecting the AD chip by data line, described AD chip is connecting CPU by data line, and the model of described linear optical coupling is HNCR201.
Further, be provided with range selector between described analog signal converter and the described linear optical coupling.
Further, also be provided with CPLD between described AD chip and the described CPU.
After adopting said structure, the utility model beneficial effect is: a kind of linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple described in the utility model, when using the utility model, replace hall device and isolation transformation by linear optical coupling, need not to change original circuit and just can satisfy the client for the requirement of high-frequency direct-current phase closing precision; Reduced simultaneously the volume of this device, and cost of manufacture is lower, can improves the competitive power of product.The utlity model has simple in structurely, arrange rationally, the advantage such as cost of manufacture is low.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
Description of reference numerals:
1, analog signal converter; 2, range selector; 3, linear optical coupling; 4, AD chip; 5, CPLD; 6, CPU.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 1, a kind of linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple described in the utility model, comprise analog signal converter 1, AD chip 4 and CPU6, it also comprises linear optical coupling 3, described analog signal converter 1 is connecting linear optical coupling 3 by data line, described linear optical coupling 3 is connecting AD chip 4 by data line, and described AD chip 4 is connecting CPU6 by data line, and novel linear optical coupling 3 models of this reality are preferably HNCR201.Single linear optical coupling HCNR201 is with respect to single isolated amplifier AD202, and volume is little a lot, and linear optical coupling is a kind of high-precision analog photoelectricity coupling mechanism, have high electrical isolation performance, good stability, and corresponding peripheral circuit is comparatively simple, convenient welding, cost are also much lower.
As a kind of optimal way of the present utility model, be provided with range selector 2 between described analog signal converter 1 and the described linear optical coupling 3; So just, can under different range configurations, use, and need not to change chip and program.
As a kind of optimal way of the present utility model, also be provided with CPLD5 between described AD chip 4 and the described CPU6.
When measuring with the utility model, not only can reduce the complicacy of circuit, make device have higher reliability and better precision, and can satisfy the client for the requirement of high-frequency direct-current phase closing precision; Have simultaneously lower cost, thereby can improve the competitive power of product.In addition, this is simple in structure, reasonable in design, low cost of manufacture.
The above only is preferred embodiments of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.
Claims (3)
1. one kind is used for the linear optical coupling high-frequency direct-current measurement mechanism that power failure is recorded ripple, comprise analog signal converter (1), AD chip (4) and CPU(6), it is characterized in that: it also comprises linear optical coupling (3), described analog signal converter (1) is connecting linear optical coupling (3) by data line, described linear optical coupling (3) is connecting AD chip (4) by data line, described AD chip (4) is connecting CPU(6 by data line), the model of described linear optical coupling (3) is HNCR201.
2. the linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple according to claim 1 is characterized in that: be provided with range selector (2) between described analog signal converter (1) and the described linear optical coupling (3).
3. the linear optical coupling high-frequency direct-current measurement mechanism for power failure record ripple according to claim 1 is characterized in that: described AD chip (4) and described CPU(6) between also be provided with CPLD(5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477638 CN202794286U (en) | 2012-09-19 | 2012-09-19 | Linear optocoupler high-frequency direct-current measuring device used for electric power fault recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477638 CN202794286U (en) | 2012-09-19 | 2012-09-19 | Linear optocoupler high-frequency direct-current measuring device used for electric power fault recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794286U true CN202794286U (en) | 2013-03-13 |
Family
ID=47821528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220477638 Expired - Fee Related CN202794286U (en) | 2012-09-19 | 2012-09-19 | Linear optocoupler high-frequency direct-current measuring device used for electric power fault recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794286U (en) |
-
2012
- 2012-09-19 CN CN 201220477638 patent/CN202794286U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130919 |