CN107390619A - A kind of instantaneous switching method of test current based on PLC controls - Google Patents
A kind of instantaneous switching method of test current based on PLC controls Download PDFInfo
- Publication number
- CN107390619A CN107390619A CN201710558288.8A CN201710558288A CN107390619A CN 107390619 A CN107390619 A CN 107390619A CN 201710558288 A CN201710558288 A CN 201710558288A CN 107390619 A CN107390619 A CN 107390619A
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- Prior art keywords
- plc
- current
- relay
- voltage
- magnitude
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13041—Display ladder or logic diagram, mnemonics, switch between two display
Abstract
The invention provides a kind of instantaneous switching method of test current based on PLC controls, including PLC to obtain the instantaneous switching command of the first relay and the second relay by touch-screen；It is preset time that PLC controls the first relay closure according to the instantaneous switching command, and the second relay is disconnected, and the magnitude of voltage and current value of 6 times of current paths are obtained by measuring instrumentss module；After the scheduled time terminates, PLC controls the first relay to disconnect, the second relay closure, and the magnitude of voltage and current value of 1 times of current path are obtained by measuring instrumentss module；Power and power factor is calculated according to magnitude of voltage and current value in PLC, and magnitude of voltage, current value, power and power factor are carried out into real-time display by touch-screen.The present invention is controlled based on PLC, is had transient test function, the current value after can accurately measuring hookup before the handover, is met the requirement of electric components detection process precision.
Description
Technical field
The present invention relates to the detection authentication techniques field of electric equipment products, more particularly to a kind of experiment electricity based on PLC controls
Flow instantaneous switching method.
Background technology
Appliance switch is as starting or controlling family expenses or similar applications electric device and the electric components of other equipment, extensively
In the general each electric appliances being applied in daily life, for directly cutting off dangerous voltage.Once the security performance of appliance switch goes out
Existing problem, will easily trigger the danger such as get an electric shock, catch fire, and directly injure human life safety and property safety, thus, to it
Connect, breaking capacity carries out the essential step that examination is guarantee product quality.According to GB15092.1-2010《Appliance switch the 1st
Part：General Requirement》The requirement of middle durability test, contact is needed to apply connection and breaking current, turn-on time keeps
After 50ms~100ms, it is switched fast and passes to breaking current value.For resistive or motor load, and perception
Load circuit, 6 times of turn-on current equivalent to rated current.Under such a background, research and development are more professional, more accurate, higher
The current signal collecting device of effect is that we carry out the vital hardware construction part of quality inspection work.
At present, the traditional time relay of the similar test equipment generally use more similar to the present invention and control relay
Circuit is switched over.The response speed of equipment is low, on the one hand can not detect transient data in time, on the other hand lack data
Writing function, trackability is poor, and reliability is low, although test requirements document can be substantially met, can influence testing result
Precision.
On the whole, existing detection technique has following defect：
1. for traditional detection device, the response speed of equipment is relatively low, can not detect transient data in time, lack number
According to writing function, trackability is poor, and reliability is low, influences the degree of accuracy of testing result.
2. for detection device general on Vehicles Collected from Market, the not collection in view of 6 times of connections/breaking current value requires,
The measuring range of electric current is typically not greater than 20A, and the indication range of equipment is limited, and the detection range of product is limited to.
The content of the invention
It is existing to solve it is an object of the invention to provide a kind of instantaneous switching method of test current based on PLC controls
Detection device circuit switching mode response speed it is relatively low, reliability is low, lack data writing function, influence testing result
The degree of accuracy the problem of.
To achieve the above object, the invention provides a kind of instantaneous switching method of test current based on PLC controls, application
In a switching device, the switching device includes：First relay and its 6 times of current paths of control；Second relay and
Its 1 times of current path controlled；Measuring instrumentss module, PLC and touch-screen, then method include：
PLC obtains the instantaneous switching command of the first relay and the second relay by touch-screen；
It is preset time that PLC control first relay to close according to the instantaneous switching command, now the
Two relays are disconnected, and the magnitude of voltage and current value of 6 times of current paths are obtained by measuring instrumentss module；
After the scheduled time terminates, PLC controls first relay to disconnect, the second relay closure, and passes through
Measuring instrumentss module obtains the magnitude of voltage and current value of 1 times of current path；
Wherein, power and power factor is calculated according to the magnitude of voltage and current value in the PLC, and by institute
State magnitude of voltage, current value, power and power factor and real-time display is carried out by the touch-screen.
It is preferred that after the PLC obtains the magnitude of voltage, current value, power and power factor, its data is deposited
Storage establishes corresponding touch-screen picture, by the address configuration containing data to screen in corresponding address, then with graphics software
Enterprising row data show, wherein, also configuration is in picture for the controlling switch of instantaneous switching command, to be controlled on the touchscreen
System.
It is preferred that the PLC reads the magnitude of voltage and current value by send instructions MOV_R, and by voltage
Value and current value are sent to preset address, and the data of the preset address are corresponding to carry out real-time display on the touch-screen.
It is preferred that the PLC is carried out data transmission with the touch-screen by ethernet line, the measuring instrumentss
Module is carried out data transmission with the PLC by RS232 connections.
The invention has the advantages that：
(1) particular/special requirement of detection and evaluation method in combination product standard evolution, the present invention are controlled based on PLC, had
Transient test function, 6 times of rated current (starting current) can be completed to 1 times of volume accurately according to the Millisecond time of setting
Determine the automatic conversion of electric current, the current value after accurately measuring hookup before the handover, and realize voltage, electric current, power, work(
The collection for the parameters such as rate factor, frequency, electric energy be accumulative, meets the requirement of electric components detection process precision；
(2) on the basis of result of the test reliability is ensured, by using more accurately measuring instrumentss, test system is realized
Automation characteristic, complete the upgrading of detection device, improve the detection level of product；
(3) monitoring of the most frequently used 8A and 6 times of starting currents of following rated current, and the device can be achieved in the present invention
It also can apply to the test parameters detection of the products such as electric automatic controller, coupler, connector.
Brief description of the drawings
Fig. 1 is the device composition schematic diagram of the preferred embodiment of the present invention；
Fig. 2 is the method flow diagram of the preferred embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention
And discussion, it is clear that as described herein is only a part of example of the present invention, is not whole examples, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to protection scope of the present invention.
For the ease of the understanding to the embodiment of the present invention, make further by taking specific embodiment as an example below in conjunction with accompanying drawing
Illustrate, and each embodiment does not form the restriction to the embodiment of the present invention.
As shown in figure 1, a kind of instantaneous switching device of test current based on PLC controls that the present embodiment provides, including：
First relay 21 and its 6 times of current paths 31 of control；
Second relay 22 and its 1 times of current path 32 of control；
Measuring instrumentss module 40, for detecting the magnitude of voltage and current value of 6 times of current paths 31 and 1 times of current path 32；
PLC 10, the magnitude of voltage and current value detected for obtaining measuring instrumentss module 40, and according to acquisition
Magnitude of voltage and current value be calculated power and power factor, and magnitude of voltage, current value, power and power factor are sent out
Deliver to touch-screen 51 to be shown, and receive the instantaneous switching command from touch-screen 51 and control the first relay 21 and second
Relay 22 is instantaneously switched；
Touch-screen 51, belong to data and show/outside input module 50, for showing gathered magnitude of voltage and current value,
Power and power factor are shown simultaneously, and for obtaining the instantaneous switching command of the first relay 21 and the second relay 22.
Wherein, when PLC 10 receives instantaneous switching command, it is preset time to control the first relay 21 closure,
Now the second relay 22 disconnects, and obtains the magnitude of voltage and current value of 6 times of current paths 31, after the scheduled time terminates, control
First relay 21 disconnects, and the second relay 22 closes, and obtains the magnitude of voltage and current value of 1 times of current path 32.
The device controls directly building in load blocks 30 respectively by two relays in circuit handover module 20
Two good current paths, it is convenient directly to control switching to carry out the parameter and 6 times of electricity of 1 times of current path by PLC
The measurement of the parameter of logical circulation road.The device can be applied to the detection field of authentication of electric equipment products, be mainly used in band inductance and electronic
Appliance switch, the durable detection of electric automatic controller of machine load.The device is controlled based on PLC, has transient test work(
Can, can accurately according to the Millisecond time of setting, complete 6 times of rated current (starting current) to 1 times of rated current from
Turn is changed, the current value after accurately measuring hookup before the handover, and realizes voltage, electric current, power, power factor, frequency
The collection for the parameters such as rate, electric energy be accumulative, meets the requirement of electric components detection process precision.And the device is ensuring to test
On the basis of result reliability, by using more accurately intelligence instrument (such as voltage of measuring instrumentss module use, current detecting
Device etc.), the automation characteristic of test system is realized, completes the upgrading of detection device, improves the detection level of product.
In the device that the present embodiment provides, the first relay 21 and the second relay 22 are included in circuit handover module 20
In, both are disposed as solid-state relay, and the solid-state relay includes：Input circuit, isolation circuit and output circuit, wherein,
Isolation circuit is used to carry out isolation coupling to input circuit and output circuit.The solid-state relay is free of moving parts, while can
Realize the handoff functionality of connecting and disconnecting of the circuit, it is possible to achieve switch on and off controlled circuit to contactless, no-spark.Coordinate PLC controls
The instantaneous switching command of device 10 processed, the instantaneous switching of relay is realized, to be switched fast the load path for making its place branch road
It is switched on or switched off rapidly.
Referring again to shown in Fig. 1, the measuring instrumentss module 40 in the present embodiment includes：
Voltage sensor 41, it is connected respectively with 6 times of current paths and 1 times of current path when being connected with detection path
Voltage；
Current sensor 42, it is connected respectively with 6 times of current paths and 1 times of current path when being connected with detection path
Electric current；
Signal processing module 43, for obtaining the voltage and electric current and carrying out filtering process；
A/D converter 44, for the signal after filtering process to be converted to the magnitude of voltage and current value of data signal.
Wherein, current sensor is connected by current transformer with 6 times of current paths and 1 times of current path, wherein,
The current transformer includes one-level coil and secondary coil, and the one-level coil is connected on 6 times of current paths and 1 times of electricity
In logical circulation road, the secondary coil is connected with the current sensor.Current transformer plays current transformation and electrical isolation is made
With high-tension current and low-voltage, high-current are become the relatively low low current of voltage by it, supply instrumentation (voltage sensor, electric current
Sensor) and protective relaying device, and instrumentation and protection device are separated with high-tension circuit.And current transformer is secondary
Side electric current is 5 amperes, and this make it that measuring instrumentss and protective relaying device are safe to use, conveniently, also makes it can be with manufacture
Standardization, simplifies manufacturing process and reduces cost.
In addition, the device also includes power supply module, for the 24V direct currents after 220V electric mains are changed, the power supply
Module includes measuring instrumentss power supply circuit, load voltage feedback power supply circuit and PLC power supply circuit, measuring instrumentss power supply
Circuit, load voltage feedback power supply circuit and PLC power supply circuit are used for the 24V after 220V electric mains are changed respectively
Direct current supply measuring instrumentss, 6 times of current paths, 1 times of current path and PLC.The electricity of civil power is accessed in power supply module
Breaker is provided with road, for being protected to each power supply circuit.
PLC 10 in the present embodiment is connected with touch-screen 51 by ethernet line, and measuring instrumentss module 40 with
PLC 10 is connected by RS232 connections.
As shown in Fig. 2 the present embodiment additionally provides a kind of instantaneous switching method of test current based on PLC controls, application
In above-mentioned device, to carry out the instantaneous change detection relevant parameter of test current, this method specifically includes：
PLC obtains the instantaneous switching command of the first relay and the second relay by touch-screen；
It is preset time that PLC control first relay to close according to the instantaneous switching command, now the
Two relays are disconnected, and the magnitude of voltage and current value of 6 times of current paths are obtained by measuring instrumentss module；
After the scheduled time terminates, PLC controls first relay to disconnect, the second relay closure, and passes through
Measuring instrumentss module obtains the magnitude of voltage and current value of 1 times of current path；
Wherein, PLC is worth to power and power factor according to the magnitude of voltage and electric current, and by magnitude of voltage, electricity
Flow valuve, power and power factor carry out real-time display by touch-screen.
Wherein, during detection, PLC reads the magnitude of voltage and current value by send instructions MOV_R, and by voltage
Value and current value are sent to preset address, and the data of the preset address are corresponding to carry out real-time display on the touch-screen.
And different intermodules are when carrying out data transmission, PLC carries out data with the touch-screen by ethernet line
Transmission.Specifically, PLC data are obtained from measuring instrumentss module and obtain power and power factor (obtain the magnitude of voltage,
After current value, power and power factor) after, by the data storage of items in corresponding address, then with ethernet line, it will touch
Screen is touched with PLC to be connected, by STEP 7-MicroWIN SMART programming softwares write-in program in PLC,
By in the address for gathering the numerical value write-in relative set come, display is controlled.SIMATIC WinCC are used again
Flexible2008 graphics softwares, corresponding touch-screen picture is established, will be shown in the address configuration rich in data to screen
Show, controlled quentity controlled variables among some switch the controlling switch as corresponding to instantaneous switching command, also configuration in picture, so as to
It is controlled on touch-screen.
And the data acquisition circuit of measuring instrumentss module is carried out data transmission with PLC by RS232 connections.It is logical
Data are shaped as two bytes, long shaping and floating-point format are four with byte, shaping, long shaping or floating-point format loopback during news
Individual byte, during loopback, high byte is preceding, and for low byte rear, floating-point format is " the 32Bit IEEE standard floating-point lattice of standard
Formula ".
Apparatus of the present invention utilize current transformer, and electric current is reduced, and can more accurately read the numerical value of electric current.
Because larger error can be produced when the numerical value of electric current is excessive, and for measuring instrumentss there is also potential safety hazard, so this
In electric current is reduced by current transformer to it, then gone back by setting scaling in instrument, then to electric current
It is former, then the current value of display will be more accurate.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those skilled in the art the invention discloses technical scope in, to the present invention deformation or replacement done, should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (4)
- A kind of 1. instantaneous switching method of test current based on PLC controls, it is characterised in that applied in a switching device, institute Stating switching device includes：First relay and its 6 times of current paths of control；Second relay and its 1 times of electric current of control lead to Road；Measuring instrumentss module, PLC and touch-screen, then method include：PLC obtains the instantaneous switching command of the first relay and the second relay by touch-screen；It is preset time that PLC control first relay to close according to the instantaneous switching command, now second after Electrical equipment is disconnected, and the magnitude of voltage and current value of 6 times of current paths are obtained by measuring instrumentss module；After the scheduled time terminates, PLC controls first relay to disconnect, the second relay closure, and passes through measurement Instrumentation module obtains the magnitude of voltage and current value of 1 times of current path；Wherein, power and power factor is calculated according to the magnitude of voltage and current value in the PLC, and by the electricity Pressure value, current value, power and power factor carry out real-time display by the touch-screen.
- 2. the test current instantaneous switching method according to claim 1 based on PLC controls, it is characterised in that the PLC After controller obtains the magnitude of voltage, current value, power and power factor, by its data storage in corresponding address, then use Graphics software, corresponding touch-screen picture is established, the address configuration containing data is shown to the enterprising row data of screen, wherein, Also configuration is in picture for the controlling switch of instantaneous switching command, to be controlled on the touchscreen.
- 3. the test current instantaneous switching method according to claim 1 or 2 based on PLC controls, it is characterised in that described PLC reads the magnitude of voltage and current value by send instructions MOV_R, and magnitude of voltage and current value is sent to default Address, the data of the preset address are corresponding to carry out real-time display on the touch-screen.
- 4. the test current instantaneous switching method according to claim 1 based on PLC controls, it is characterised in that the PLC Controller is carried out data transmission with the touch-screen by ethernet line, and the measuring instrumentss module is led to the PLC RS232 connections are crossed to carry out data transmission.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710558288.8A CN107390619A (en) | 2017-07-10 | 2017-07-10 | A kind of instantaneous switching method of test current based on PLC controls |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710558288.8A CN107390619A (en) | 2017-07-10 | 2017-07-10 | A kind of instantaneous switching method of test current based on PLC controls |
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| CN107390619A true CN107390619A (en) | 2017-11-24 |
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| CN201710558288.8A Pending CN107390619A (en) | 2017-07-10 | 2017-07-10 | A kind of instantaneous switching method of test current based on PLC controls |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109961678A (en) * | 2017-12-22 | 2019-07-02 | 中核核电运行管理有限公司 | The general instructional device of nuclear power station PLC logic controller |
| CN110082673A (en) * | 2018-01-26 | 2019-08-02 | 煤科集团沈阳研究院有限公司 | Low-voltage alternating-current switch on and off examines power factor test macro and test method |
| CN110988407A (en) * | 2019-12-03 | 2020-04-10 | 国网河南省电力公司鹤壁供电公司 | Switching device for detecting main transformer protection circuit |
| CN114295094A (en) * | 2022-01-06 | 2022-04-08 | 北京博格华纳汽车传动器有限公司 | Long shaft clearance value measuring instrument and measuring system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093551A (en) * | 2016-08-17 | 2016-11-09 | 云南电网有限责任公司电力科学研究院 | A kind of current acquisition Apparatus and method for |
| CN205861753U (en) * | 2016-06-20 | 2017-01-04 | 上海荟格工业自动化有限公司 | A kind of instantaneous switching of intelligent three-phase current and supervising device |
-
2017
- 2017-07-10 CN CN201710558288.8A patent/CN107390619A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205861753U (en) * | 2016-06-20 | 2017-01-04 | 上海荟格工业自动化有限公司 | A kind of instantaneous switching of intelligent three-phase current and supervising device |
| CN106093551A (en) * | 2016-08-17 | 2016-11-09 | 云南电网有限责任公司电力科学研究院 | A kind of current acquisition Apparatus and method for |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109961678A (en) * | 2017-12-22 | 2019-07-02 | 中核核电运行管理有限公司 | The general instructional device of nuclear power station PLC logic controller |
| CN110082673A (en) * | 2018-01-26 | 2019-08-02 | 煤科集团沈阳研究院有限公司 | Low-voltage alternating-current switch on and off examines power factor test macro and test method |
| CN110988407A (en) * | 2019-12-03 | 2020-04-10 | 国网河南省电力公司鹤壁供电公司 | Switching device for detecting main transformer protection circuit |
| CN110988407B (en) * | 2019-12-03 | 2023-08-11 | 国网河南省电力公司鹤壁供电公司 | Switching device for detecting main transformer protection loop |
| CN114295094A (en) * | 2022-01-06 | 2022-04-08 | 北京博格华纳汽车传动器有限公司 | Long shaft clearance value measuring instrument and measuring system |
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Application publication date: 20171124 |