CN205809739U - A kind of metering attemperating unit based on PLC - Google Patents
A kind of metering attemperating unit based on PLC Download PDFInfo
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- CN205809739U CN205809739U CN201620726942.2U CN201620726942U CN205809739U CN 205809739 U CN205809739 U CN 205809739U CN 201620726942 U CN201620726942 U CN 201620726942U CN 205809739 U CN205809739 U CN 205809739U
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- metering
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 38
- 239000010703 silicon Substances 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Control Of Resistance Heating (AREA)
Abstract
The utility model discloses a kind of metering attemperating unit based on PLC; mainly it is made up of with display module controller module, AC DC power module, resistance-type heating furnace and button; described controller module includes a PLC; described PLC connects an A/D converter; A/D converter connects a variable connector; described PLC connects a thermal-shutdown circuit, and thermal-shutdown circuit is connected to variable connector；Described PLC connects a controllable silicon drive circuit, and controllable silicon drive circuit is connected to resistance-type heating furnace；The logic control ability of this utility model PLC, makes whole device interface more friendly, more reasonable structure；Additionally have employed three sections of independent temperature control modes, make temperature field in metering process be more uniformly distributed, symmetrical；Can the more efficient technical specification meeting national regulation accurately, have low in energy consumption, size is little, the technical characterstic of low-carbon environment-friendly.
Description
Technical field
This utility model relates to field of measuring techniques, a kind of metering attemperating unit based on PLC.
Background technology
Along with improving constantly of modern industrial technology and standard, national metrological regulations to the requirement of thermocouple calibration also by
Step rises, and suffers from temperature measurement and monitor relevant application in the fields such as the industry modernized, medical science, military affairs, space flight.Logical
Cross and build a stable temperature source, measure compare for accredited object and reference system.According to up-to-date national thermoelectricity
During even vertification regulation is for thermocouple calibration, the accuracy of temperature source, stability and temperature-measuring range require that all ratio was in the past
Greatly improve, start late, because the standardization of the industry the most just starts owing to China's measuring equipment and automatic technology develop.
A kind of traditional metering temperature control control model is formed temperature by heater, Temperature Feedback and controller and controls to close
Loop systems forms, owing to the upper and lower both direction of heater all can be to the heat that leaks outside, and due to the physical arrangement of heater own, ventilation
Radiating effect inconsistent, the leaking heat of both direction is difficult to symmetry, and therefore temperature-the displacement curve of heter temperature field is difficult to
Ensure with heater for geometric center symmetrical, therefore metric results can be affected.Additionally in metering process, metering
Parameter be often also required to manually enter, automaticity is the highest.
Utility model content
The purpose of this utility model is to provide a kind of metering attemperating unit based on PLC, to solve above-mentioned background technology
The problem of middle proposition.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of metering attemperating unit based on PLC, mainly by controller module, AC-DC power module, resistance-type heating
Stove, button form with display module, and described controller module includes that a PLC, described PLC connection has an A/D converter, A/
D transducer connects a variable connector, and described PLC connects a thermal-shutdown circuit, and thermal-shutdown circuit is connected to multichannel
Switch；Described PLC connects a controllable silicon drive circuit, and controllable silicon drive circuit is connected to resistance-type heating furnace；Described PLC
It is also respectively connected with an amplitude detection circuit and a zero cross detection circuit.
Described PLC is connected to AC-DC power module, and AC-DC power module is connected to alternating current power supply；Described alternating current power supply is divided
It is not connected to resistance-type heating furnace, amplitude detection circuit and zero cross detection circuit.
A relay it is provided with in described resistance-type heating furnace；Described relay outer shroud connects live wire and controlled by wire
Silicon 1, controllable silicon 1 connects a middle warm area heater strip, and middle warm area heater strip connects zero line and controllable silicon 2 by wire.
Described relay internal ring is in series with a upper warm area heater strip, and upper warm area heater strip connects a lower warm area heating
Silk；Upper warm area heater strip connects controllable silicon 3, and controllable silicon 3 is connected to controllable silicon 1.
As further scheme of the present utility model: described variable connector connects a cold junction compensation circuit.
As further scheme of the present utility model: described resistance-type heating furnace respectively with variable connector and overheat protector
Circuit connects.
As further scheme of the present utility model: described PLC connects a USB/RS232 telecommunication circuit.
As further scheme of the present utility model: described PLC connects a button and display module.
Compared with prior art, the beneficial effects of the utility model are: make use of logic control ability powerful for PLC, make
Whole device interface is more friendly, more reasonable structure, it is simple to the monitoring in real time of technical staff, with unattended, improves automatization's journey
Degree；Additionally have employed three sections of independent temperature control modes, make temperature field in metering process be more uniformly distributed, symmetrical；Energy is more efficient accurately
The technical specification meeting national regulation, have low in energy consumption, size is little, the technical characterstic of low-carbon environment-friendly.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of metering attemperating unit based on PLC.
Fig. 2 is the temperature control schematic diagram of resistance-type heating furnace.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.
Referring to Fig. 1 and Fig. 2, in this utility model embodiment, a kind of metering attemperating unit based on PLC, mainly by controlling
Device module processed, AC-DC power module, resistance-type heating furnace and button form with display module, and described controller module includes one
Individual PLC, described PLC connect an A/D converter, and A/D converter connects a variable connector, and described PLC connects one
Thermal-shutdown circuit, thermal-shutdown circuit is connected to variable connector；Described PLC connects a controllable silicon drive circuit, controlled
Silicon drive circuit is connected to resistance-type heating furnace；Described PLC is also respectively connected with an amplitude detection circuit and a zero passage detection
Circuit.
Described PLC is connected to AC-DC power module, and AC-DC power module is connected to alternating current power supply；Described alternating current power supply is divided
It is not connected to resistance-type heating furnace, amplitude detection circuit and zero cross detection circuit.
Described resistance-type heating furnace is connected with variable connector and thermal-shutdown circuit respectively.
Described variable connector connects a cold junction compensation circuit, is used for measuring the absolute temperature compensating galvanic couple measurement end in loop
Degree.
A relay it is provided with in described resistance-type heating furnace；Described relay outer shroud connects live wire and controlled by wire
Silicon 1, controllable silicon 1 connects a middle warm area heater strip, and middle warm area heater strip connects zero line and controllable silicon 2 by wire.
Described relay internal ring is in series with a upper warm area heater strip, and upper warm area heater strip connects a lower warm area heating
Silk；Upper warm area heater strip connects controllable silicon 3, and controllable silicon 3 is connected to controllable silicon 1.
In implementation process, the function of AC-DC power module is that 220V alternating current is converted to direct current light current, for whole control
Device module provides stable power supply.Button and display module provide the interface of man machine interface operation, and input user sets metering
Target temperature point, and provide current real time temperature, and pid parameter, overheat protector limit value and temperature field calibration ginseng can be shown
Some systematic parameters such as number.
Resistance-type heating furnace is controlled by PLC allotment controllable silicon drive circuit, be used for providing one uniformly the most to be detected
Warm field for thermocouple.Controller module performs the control function of whole device, and the temperature receiving man machine interface input is arranged,
The feedback of detecting thermocouple signal, according to pid algorithm output pwm signal to controllable silicon drive circuit, reaches to control resistance-type and adds
The purpose of hot device power.
PLC, controllable silicon drive circuit, resistance-type heating furnace, multidiameter option switch, and A/D converter constitutes whole meter
The closed loop control flow process of amount attemperating unit.
The zero crossing detection function of 220V alternating current, amplitude detection function, USB/RS232 communication function, be all controller mould
Block is by controlling corresponding circuit realiration.
The duty cycle of switching of warm area heater strip in controllable silicon 1 control, controllable silicon 2 controls opening of upper and lower warm area series connection heater strip
Closing dutycycle, controllable silicon 3 is used for carrying out extra power back-off, with equilibrium temperature and the bilateral symmetry of coordinate curve.One
The relay of single-pole double throw is for controlling to select current path and the direction of each heater strip element.
During work, use PWM control method, a control cycle is divided into two control stages, in first stage,
Controllable silicon 1 and controllable silicon 2 turn on, and respective conducting dutycycle is calculated by actual feedback temperature and pid control algorithm, with
Time, the power of the upper and lower warm area heater strip of warm area heater strip and series connection in controlling respectively, now controllable silicon 3 turns off.At second
In stage, controllable silicon 3 individually turns on, and controllable silicon 1 and 2 turns off, and now can reconcile relay switch state, make upper and lower warm area heat
Silk produces different power, and then regulates the temperature contrast at upper and lower two ends.
Innovative point is to introduce a kind of novel reconfigurable heater circuit in resistance-type heating furnace, specifically will add
Hot device is divided into three sections of basic heating element heaters, by controlling the switch connected on wire of every segment element, it may be assumed that silicon controlled state,
Make each segment element of heater different periods in each control cycle arbitrarily to interconnect, produce dynamic power and control
Effect.This utility model, in order to reduce cost, selects to use two groups of thermocouples as Temperature Feedback, and two thermocouples separately detect
Middle warm area and the temperature of upper warm area by A/D converter, return sampling feedback to controller.Thus reduce the one-tenth of temperature control system
This, and can preferably reduce upper warm area heater strip and the power consumption of lower warm area heater strip and the size of heating element heater, ensure simultaneously
The uniformity of humidity province and symmetry can reach the requirement of country's thermocouple measurement verification regulations.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this practicality in other specific forms new
Type.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (5)
1. a metering attemperating unit based on PLC, mainly by controller module, AC-DC power module, resistance-type heating furnace and
Button forms with display module, it is characterised in that: described controller module includes that a PLC, described PLC connection has an A/D
Transducer, A/D converter connects a variable connector；Described PLC connects a thermal-shutdown circuit, and thermal-shutdown circuit is even
It is connected to variable connector；Described PLC connects a controllable silicon drive circuit, and controllable silicon drive circuit is connected to resistance-type heating
Stove；Described PLC is also respectively connected with an amplitude detection circuit and a zero cross detection circuit；Described PLC is connected to AC-DC power supply
Module, AC-DC power module is connected to alternating current power supply；Described alternating current power supply is respectively connecting to resistance-type heating furnace, amplitude detection
Circuit and zero cross detection circuit；A relay it is provided with in described resistance-type heating furnace；Described relay outer shroud is by wire even
Starting to exchange fire line and controllable silicon 1, controllable silicon 1 connects a middle warm area heater strip, middle warm area heater strip by wire connect zero line and
Controllable silicon 2；Described relay internal ring is in series with a upper warm area heater strip, and upper warm area heater strip connects a lower warm area heating
Silk；Upper warm area heater strip connects controllable silicon 3, and controllable silicon 3 is connected to controllable silicon 1.
A kind of metering attemperating unit based on PLC the most according to claim 1, it is characterised in that: described variable connector is even
It is connected to a cold junction compensation circuit.
A kind of metering attemperating unit based on PLC the most according to claim 1, it is characterised in that: described resistance-type heats
Stove is connected with variable connector and thermal-shutdown circuit respectively.
A kind of metering attemperating unit based on PLC the most according to claim 1, it is characterised in that: described PLC connects one
USB/RS232 telecommunication circuit.
A kind of metering attemperating unit based on PLC the most according to claim 1, it is characterised in that: described PLC connects one
Button and display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620726942.2U CN205809739U (en) | 2016-07-12 | 2016-07-12 | A kind of metering attemperating unit based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620726942.2U CN205809739U (en) | 2016-07-12 | 2016-07-12 | A kind of metering attemperating unit based on PLC |
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| Publication Number | Publication Date |
|---|---|
| CN205809739U true CN205809739U (en) | 2016-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620726942.2U Active CN205809739U (en) | 2016-07-12 | 2016-07-12 | A kind of metering attemperating unit based on PLC |
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| Country | Link |
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| CN (1) | CN205809739U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340067A (en) * | 2017-06-22 | 2017-11-10 | 芜湖航天特种电缆厂股份有限公司 | Anti- winding wire burns out overheat protector siren |
-
2016
- 2016-07-12 CN CN201620726942.2U patent/CN205809739U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340067A (en) * | 2017-06-22 | 2017-11-10 | 芜湖航天特种电缆厂股份有限公司 | Anti- winding wire burns out overheat protector siren |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170306 Address after: Nine road 530000 the Guangxi Zhuang Autonomous Region Nanning high tech Zone No. 23 Ke Yuan Xi Guangxi measurement and Testing Institute Patentee after: Guangxi Research Institute of Measurement and Testing Address before: Nine road 530007 the Guangxi Zhuang Autonomous Region Nanning high tech Zone No. 23 Ke Yuan Xi Guangxi measurement and Testing Institute Patentee before: Zhang Yi |