CN206020643U - A kind of protection class instrument automatic batch calibrating installation - Google Patents
A kind of protection class instrument automatic batch calibrating installation Download PDFInfo
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- CN206020643U CN206020643U CN201620852891.8U CN201620852891U CN206020643U CN 206020643 U CN206020643 U CN 206020643U CN 201620852891 U CN201620852891 U CN 201620852891U CN 206020643 U CN206020643 U CN 206020643U
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Abstract
This utility model is related to a kind of protection class instrument automatic batch calibrating installation.Mainly solve the problems, such as that the protection such as guard grating class instrument cannot be calibrated in batches.Described signal generator connection is less than 24 tested instrument, tested instrument connects industrial computer by three tunnel PLC modules, industrial computer connects host computer printing certificate system, described DC source includes that the tested instrument in two Tai Wei, 24 roads provides the D.C. regulated power supply of power supply, described PLC module includes that 8 tunnel signals collecting AI modules are also equipped with busbar in whole device bottom, by signal generator, industrial computer, DC source, PLC module ground connection.The characteristics of there is simple structure, high working efficiency.
Description
Technical field
This utility model is related to calibrating indicating instrument technical field, is especially for guard grating, distributor, signal of telecommunication conversion
Device, a kind of protection class instrument automatic batch calibrating installation of intelligent transducer.
Background technology
Protection class instrument includes. guard grating, distributor, electric signal transducer, intelligent transducer etc., function：Dangerous anti-
The protection such as guard grating that quick-fried place is installed class instrument provides power supply for field instrument, when being short-circuited, handle in this loop
Loop current is limited in 35mA (in safety spark claimed range), it is to avoid free explosion accident.Existing collimation technique and device：Press
According to the requirement of detection calibration authority domestic at present (including manufacturer for carried out exfactory inspection of dispatching from the factory) to security classes
The calibration of instrument is still based on separate unit measurement, temporarily also not for the equipment which is calibrated in batches, external calibration authority
(the large-scale apparatus manufacturer such as well-known FLUKE, Bei Meikesi of Finland) research also without this respect, also all rests on
Separate unit measure, not batch calibration equipment, 1, detection speed slow；2nd, efficiency is low；3rd, lack later data to process and computing
Process；4th, Data Detection result manual record；When the 5th, detecting, several instruments are used simultaneously, and the safety of personnel and equipment cannot be protected
Barrier；6th, when detection task is big, working strength is big, work load weight.
Utility model content
For solving problem present in background technology, this utility model solves the protection class instrument batch calibration such as guard grating
Problem, now provides a kind of batch self-checking device, it is achieved that the protection class instrument such as different manufacturers, guard grating of different model
Batch is calibrated, and improves work efficiency.
Technical solutions of the utility model：
A kind of protection class instrument automatic batch calibrating installation, including DC source, signal generator, PLC module, industry control
Machine, host computer printing certificate system, described signal generator connection are less than 24 tested instrument, wherein, signal generator
Including three multichannel testers, every tester has 8 tunnels output completely isolated mutually, the wherein tested instrument of D.C. regulated power supply
Table connects industrial computer by three tunnel PLC modules, and industrial computer connects host computer printing certificate system, and described DC source includes two
The tested instrument in 24 roads of Tai Wei provides the D.C. regulated power supply of power supply, and described PLC module includes 8 tunnel signals collecting AI modules,
Whole device bottom is also equipped with busbar, by signal generator, industrial computer, DC source, PLC module ground connection.
A kind of protection class instrument automatic batch calibration steps, its step are as follows,
I, the opening that switches on power main switch, determine that whole device is powered, and correctly connection instrument power line and holding wire；
II, opening D.C. regulated power supply, and guarantee that the stable instrument of connecting after 24V of D.C. regulated power supply supply voltage is protected
Danger；
Timing is input into the constant current signals of 4-20mA, the letter of PLC module to tested instrument one by one for III, signal generator
Number collection AI modules response input signal, size of current is followed successively by 4mA, 8mA, 12mA, 16mA, 20mA, while measuring and recording
Corresponding output current value, calculates error, then by order 20mA, 16mA from high to low, 12mA, 8mA, 4mA, according to
Secondary reverse measuremenet, draws hysterisis error, and the time interval that each signal sends is 20 seconds, and the elementary error of guard grating should meet mistake
Poor requirement, is calculated by formula (1)；
In formula：
ΔAThe error amount of each calibration point, %；
AdThe actual measured value of each calibration point, mA；
ASThe theoretical output valve of each calibration point, mA；
AmInput (output) range (mA) of guard grating, that is, be input into the difference of (output) upper and lower limit, mA；
Hysterisis error is calculated
The hysterisis error of guard grating should meet the requirement of allowable error.When hysterisis error absolute error mode is represented, can
Press formula (2) calculating.
ΔReturn=| AOn-AUnder| (2)
In formula：
ΔReturnThe allowable error represented with absolute error mode, %；
AOnThe ascending error i.e. measured by up stroke of input signal, %；
AUnderThe descending error i.e. measured by down stroke of input signal, %；
IV, calibrated finish after check that calibration data is whether correct, and whether there is overproof, confirm errorless rear host computer certificate
Print system can generate detection record and testing result.
The beneficial effects of the utility model are：The D.C. regulated power supply of this device can be adjusted, and be allowed to power supply and stablize
24VDC or so；Input signal (4-20) mA for tested instrument, takes transmission of fixed place and time, reduces and be manually entered
Signal loaded down with trivial details；The output signal (24 tunnel) of tested instrument is directly accessed the AI modules in PLC, while being easy to signal at collection
Reason；Industrial computer carries out computing to the signal for being detected automatically according to program setting, and obtained operation result is arrived according to instructions match
In the middle of detection charting, and maximum error of measuring and hysterisis error are selected according to operation result, detection record is automatically saved
In computer；Dock with diploma system, click on and upload protocol, form detection certificate；
System is easy to personnel to check testing result using double interface display；Device has unified ground connection busbar,
Grounding device outside connection, has ensured the safety of the person and equipment.
Description of the drawings
Fig. 1 is this utility model device design principle figure
Fig. 2 is signal input principle schematic
Fig. 3 is signals collecting principle schematic
Fig. 4 is principles of signal processing schematic diagram
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described further
Class instrument automatic batch calibrating installation is protected as Fig. 1-4 is a kind of, including DC source, signal generator, PLC moulds
Block, industrial computer, host computer printing certificate system, described signal generator connection are less than 24 tested instrument, wherein, signal
Generator includes that three multichannel testers, every tester have 8 tunnels output completely isolated mutually, wherein D.C. regulated power supply
Tested instrument connects industrial computer by three tunnel PLC modules, and industrial computer connects host computer printing certificate system, described DC source
Including the D.C. regulated power supply that the tested instrument in two Tai Wei, 24 roads provides power supply, described PLC module includes 8 tunnel signals collecting AI moulds
Block, is also equipped with busbar in whole device bottom, by signal generator, industrial computer, DC source, PLC module ground connection.
A kind of protection class instrument automatic batch calibration steps, its step are as follows, and the opening that switches on power main switch, determination are whole
Device is powered, and correctly connection instrument power line and holding wire；D.C. regulated power supply is opened, and guarantees that D.C. regulated power supply is supplied
Piezoelectric voltage is stable to connect instrument insurance after 24V；Timing is input into the constant electricity of 4-20mA to tested instrument to signal generator one by one
Stream signal, PLC module signals collecting AI module response input signal, size of current be followed successively by 4mA, 8mA, 12mA, 16mA,
20mA, while measure and record corresponding output current value, calculates error, then by order 20mA from high to low,
16mA, 12mA, 8mA, successively 4mA, reverse measuremenet, draw hysterisis error, and the time interval that each signal sends is 20 seconds, safety
The elementary error of grid answers the requirement of coincidence loss, calculates by formula (1)；
In formula：
ΔAThe error amount of each calibration point, %；
AdThe actual measured value of each calibration point, mA；
ASThe theoretical output valve of each calibration point, mA；
AmInput (output) range (mA) of guard grating, that is, be input into the difference of (output) upper and lower limit, mA；
Hysterisis error is calculated
The hysterisis error of guard grating should meet the requirement of allowable error.When hysterisis error absolute error mode is represented, can
Press formula (2) calculating.
ΔReturn=| AOn-AUnder| (2)
In formula：
ΔReturnThe allowable error represented with absolute error mode, %；
AOnThe ascending error i.e. measured by up stroke of input signal, %；
AUnderThe descending error i.e. measured by down stroke of input signal, %；
Calibrated finish after check that calibration data is whether correct, and whether there is overproof, confirm that errorless rear host computer certificate is beaten
Print system can generate detection record and testing result.
Whole system can be connected to centre information system by LAN, and reception process is fully according to being connect by the instrument at center
Receipts program receives instrument, reads meter information to be checked, and because the system can only calibrate guard grating, therefore lightning protection grid information can not be read
Take, it is to avoid flase drop, measuring samples installed on the apparatus according to sample number into spectrum, calibration process realizes automatization, one-key operation,
If desired for midway can also terminate, calibration finish after protocol will be saved in industrial computer hard disk with the date as filename, with
Shi Yike is printed by printer, and calibration data one-key batch is uploaded to system after finishing of calibrating the clothes of centre information system
Business device, completes the printing of calibration certificate.
D.C. regulated power supply is powered directly to tested table, by signal generator transmission DC current signal of fixed place and time, quilt
Inspection instrument output signal is received by AI modules in PLC, and industrial computer carries out the process of signal errors, and the result after process matches electricity
In the middle of subrecord, it is connected with diploma system by spare interface, realizes the automatic printing of certificate.
Claims (1)
1. a kind of protection class instrument automatic batch calibrating installation, including DC source, signal generator, PLC module, industrial computer,
Host computer printing certificate system, it is characterised in that：Described signal generator connection is less than 24 tested instrument, wherein, letter
Number generator includes that three multichannel testers, every tester have 8 tunnels output completely isolated mutually, wherein DC voltage-stabilizing electricity
The tested instrument in source connects industrial computer by three tunnel PLC modules, and industrial computer connects host computer printing certificate system, described unidirectional current
Source includes that the tested instrument in two Tai Wei, 24 roads provides the D.C. regulated power supply of power supply, and described PLC module includes 8 tunnel signals collecting AI
Module, is also equipped with busbar in whole device bottom, by signal generator, industrial computer, DC source, PLC module ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620852891.8U CN206020643U (en) | 2016-08-08 | 2016-08-08 | A kind of protection class instrument automatic batch calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620852891.8U CN206020643U (en) | 2016-08-08 | 2016-08-08 | A kind of protection class instrument automatic batch calibrating installation |
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| Publication Number | Publication Date |
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| CN206020643U true CN206020643U (en) | 2017-03-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703472A (en) * | 2016-08-08 | 2018-02-16 | 中国石油天然气集团公司 | One kind protection class instrument automatic batch calibrating installation and calibration method |
-
2016
- 2016-08-08 CN CN201620852891.8U patent/CN206020643U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703472A (en) * | 2016-08-08 | 2018-02-16 | 中国石油天然气集团公司 | One kind protection class instrument automatic batch calibrating installation and calibration method |
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