CN208689440U - A kind of DCS control system common mode and series mode rejection ratio test device - Google Patents
A kind of DCS control system common mode and series mode rejection ratio test device Download PDFInfo
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- CN208689440U CN208689440U CN201821713060.8U CN201821713060U CN208689440U CN 208689440 U CN208689440 U CN 208689440U CN 201821713060 U CN201821713060 U CN 201821713060U CN 208689440 U CN208689440 U CN 208689440U
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Abstract
The utility model discloses a kind of DCS control system common modes and series mode rejection ratio test device, including standard signal source, interference signal source, circuit connection device, tested control system and man-machine interface, standard signal source and interference signal source are connect with circuit connection device, circuit connection device is connect with the channel I/O of tested control system, tested control system is connect with man-machine interface, by in tested set-up of control system function fitter, big value selector, small value selector, summing function generator, five class function code of logarithm function generator, simultaneously at tested control system surface setting common mode and series mode rejection ratio test operation interface, complete common mode and the automatic test of series mode rejection ratio test, the voltage max Umax after introducing interference can be accurately obtained in test process, minimum value Umin, to guarantee DC S control system common mode and series mode rejection ratio accuracy rate are 100%, and the present apparatus is more more convenient than manual measurement mode, working efficiency is higher.
Description
Technical field
The utility model relates to computer control system technical field of performance test, and in particular to a kind of DCS control system
Common mode and series mode rejection ratio test device.
Background technique
Power plant routine DCS system common mode and series mode rejection ratio are tested: manually connecing input terminal plus a direct current to channel
It presses (standard signal), value is the 1/2 to 2/3 of full scale, is then gradually increased common mode respectively with two kinds of situations are exchanged by direct current
Interference voltage, Umax, Umin show value of the interior signal of manual record certain period of time, records common mode disturbance voltage value at this time
Uc obtains the inhibition ratio of corresponding interference voltage by common mode and series mode rejection ratio calculation formula.This method is using artificial acquisition number
According to since the signal acquisition unit period is generally 1 millisecond, control system signal show value refreshing frequency is lower (1 second), so people
Umax, Umin of work record are not necessarily the maximum and minimum value of test period signal, cause the inhibition being calculated than inaccurate
Really, this method disadvantages such as that there are calculated results is unreliable, working efficiency is low.
Summary of the invention
The technical issues of the utility model solves: proposing a kind of DCS control system common mode and series mode rejection ratio test device,
To overcome manual testing's accuracy rate existing in the prior art not high, the problem of test job is time-consuming and laborious, low efficiency.
The technical solution of the utility model includes:
A kind of DCS control system common mode and series mode rejection ratio test device, including standard signal source, interference signal source, electricity
Road electric wire connecting junction, tested control system and man-machine interface, the standard signal source and interference signal source connect with circuit connection device
It connects, the circuit connection device is connect with the channel I/O of tested control system, and the tested control system and man-machine interface connect
It connects.
The tested control system includes function fitter, big value selector, small value selector, summing function hair
Raw device, five class function code of logarithm function generator.
The man-machine interface is DCS engineer station.
The tested control system surface is provided with test operation interface.
The utility model has the beneficial effects that proposing a kind of DCS control system common mode and series mode rejection ratio test device, pass through
In tested set-up of control system function fitter, big value selector, small value selector, summing function generator, logarithm letter
Five class function code of number generator, while common mode and series mode rejection ratio test operation interface are set on tested control system surface, it is complete
At common mode and the automatic test of series mode rejection ratio test, the electricity after introducing interference can be accurately obtained in the utility model test process
Maximum value Umax, minimum value Umin are pressed, to guarantee that DCS system common mode and series mode rejection ratio accuracy rate are 100%, uses the dress
Setting development test, manual measurement mode is more convenient, working efficiency is higher than using.
Detailed description of the invention
Fig. 1 is utility model device attachment structure schematic diagram；
Fig. 2 is the utility model automatic measurement logical schematic.
Specific embodiment
The utility model is further introduced with reference to the accompanying drawing, a kind of DCS control system described in the utility model
Altogether mould and series mode rejection ratio test device, including standard signal source, interference signal source, circuit connection device, tested control system
And man-machine interface, the standard signal source and interference signal source are connect with circuit connection device, the circuit connection device with
The channel the I/O connection of tested control system, the tested control system are connect with man-machine interface.
The tested control system includes function fitter, big value selector, small value selector, summing function hair
Raw device, five class function code of logarithm function generator.
The man-machine interface is DCS engineer station.
The tested control system is HOLLiAS-MACSV scattered control system, and surface is provided with test operation interface.
By in tested set-up of control system function fitter, big value selector, small value selector, summing function hair
Raw device, five class function code of logarithm function generator, while being tested in tested control system surface setting common mode and series mode rejection ratio
Operation interface is completed common mode and the automatic test of series mode rejection ratio test, can accurately be drawn in the utility model test process
Voltage max Umax, minimum value Umin after entering interference, to guarantee that DCS system common mode is with series mode rejection ratio accuracy rate
100%, carrying out test using the device, manual measurement mode is more convenient, working efficiency is higher than using.
Claims (4)
1. a kind of DCS control system common mode and series mode rejection ratio test device, it is characterised in that: including standard signal source, interference
Signal source, circuit connection device, tested control system and man-machine interface, the standard signal source and interference signal source are and circuit
Electric wire connecting junction connection, the circuit connection device are connect with the channel I/O of tested control system, the tested control system and people
The connection of machine interface.
2. a kind of DCS control system common mode according to claim 1 and series mode rejection ratio test device, it is characterised in that:
The tested control system includes function fitter, big value selector, small value selector, summing function generator, right
Number five class function code of function generator.
3. a kind of DCS control system common mode according to claim 1 and series mode rejection ratio test device, it is characterised in that:
The man-machine interface is DCS engineer station.
4. a kind of DCS control system common mode according to claim 1 and series mode rejection ratio test device, it is characterised in that:
The tested control system surface is provided with test operation interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821713060.8U CN208689440U (en) | 2018-10-22 | 2018-10-22 | A kind of DCS control system common mode and series mode rejection ratio test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821713060.8U CN208689440U (en) | 2018-10-22 | 2018-10-22 | A kind of DCS control system common mode and series mode rejection ratio test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208689440U true CN208689440U (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821713060.8U Active CN208689440U (en) | 2018-10-22 | 2018-10-22 | A kind of DCS control system common mode and series mode rejection ratio test device |
Country Status (1)
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| CN (1) | CN208689440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343511A (en) * | 2018-10-22 | 2019-02-15 | 贵州电网有限责任公司 | A kind of DCS control system common mode and series mode rejection ratio test device and test method |
-
2018
- 2018-10-22 CN CN201821713060.8U patent/CN208689440U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343511A (en) * | 2018-10-22 | 2019-02-15 | 贵州电网有限责任公司 | A kind of DCS control system common mode and series mode rejection ratio test device and test method |
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