CN202974509U - Thermocouple online verification and calibration system - Google Patents
Thermocouple online verification and calibration system Download PDFInfo
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- CN202974509U CN202974509U CN 201220749487 CN201220749487U CN202974509U CN 202974509 U CN202974509 U CN 202974509U CN 201220749487 CN201220749487 CN 201220749487 CN 201220749487 U CN201220749487 U CN 201220749487U CN 202974509 U CN202974509 U CN 202974509U
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- thermopair
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Abstract
The utility model discloses a thermocouple online verification and calibration system, belonging to the field of industrial thermocouple verification equipment. The thermocouple online verification and calibration system comprises a working thermocouple connected with a secondary meter, and is characterized in that: a standard thermocouple is arranged on one side of the working thermocouple of the kiln, output ends of the working thermocouple and the standard thermocouple are connected with input ends of thermocouple data collectors, and output ends of the plurality of thermocouple data collectors are connected with a host machine through a wireless communication device. The standard signal and the detected signals are converted through the thermocouple data collectors and are transmitted to the host machine remotely through a wireless network, so as to determine the temperature response curve of the verified working thermocouple, the host machine automatically carries out data analysis and generates calibration records and reports, and the design does not affect the signal acquisition of the secondary meter. The thermocouple online verification and calibration system has the advantages such as portability, on-line property and intelligence, guarantees the continuous production of enterprises, and provides the basis for accurate tracing of thermocouple data.
Description
Technical field
The utility model relates to a kind of thermopair in-line calibration calibration system, belongs to industrial heat galvanic couple calibration equipment field.
Background technology
Thermopair is most widely used general in enterprise's commercial production, is temperature element commonly used in temperature measuring instrument.Detect industry in metering, the calibrating of thermopair must be dismantled thermopair from applied environment, send into the laboratory, puts into electric thermo-couple test furnace with the even binding of standard and examines and determine; Cause in verification process to produce to stop production, with human and material resources, financial resources and the waste of time that causes greatly.
Present domestic other technologies mechanism also studies, but can't avoid problem all the time, the problem includes: two problems the on-site proving of thermopair/calibration:
1, in calibrating/calibration process, industrial thermocouple is taken out from working environment;
2, the measurement verification personnel need to examine and determine at the scene for a long time/calibration operation.
The utility model content
The purpose of this utility model is to overcome the defective of prior art and a kind of calibration of thermocouple of can realizing under the prerequisite that the continuous production of enterprise need not be dismantled is provided, and realizes the thermopair in-line calibration calibration system of remote data transmission.
The technical scheme that realizes above-mentioned purpose is: thermopair in-line calibration calibration system, comprise working heat galvanic couple connecting secondary instrument, it is characterized in that: working heat galvanic couple one side at kiln arranges standard couple, the working heat galvanic couple is connected the input end of thermopair data acquisition unit with the output terminal of standard couple, the output terminal of some thermopair data acquisition units connects main frame by wireless communication apparatus.
Standard couple is placed in tested working heat galvanic couple same temperature environment, obtain the standard temperature signal, by the thermopair data acquisition unit, standard signal and measured signal are changed and be sent at a distance main frame by wireless network, determine the temperature response curve of tested working heat galvanic couple, main frame automatically carries out data analysis and generates calibration record and report.This design can be ignored the impact of the signals collecting generation of secondary instrument, does not affect its normal operation.
Wherein preferred version is:
Described thermopair data acquisition unit comprises amplifier, A/D converter and single-chip microcomputer, the input end of amplifier connects respectively working heat galvanic couple and standard couple, the output terminal of amplifier connects the input end of A/D converter, the output terminal of A/D converter connects the input end of single-chip microcomputer, and the communication terminal of single-chip microcomputer arranges 485 chips and connects wireless communication apparatus.When measuring temperature, export very faint millivolt signal due to thermopair, therefore when carrying out the A/D conversion, need the front end millivolt signal is amplified.Data transmit through RS485 transceiver MAX485, by TXD and the RXD sending and receiving of serial port of single chip computer.MAX485 is a kind of difference balanced type low power transceiver chip.The advantage of RS485 maximum is its multi-point bus interconnect function, can connect 1 main frame and communicate by letter simultaneously with many station terminals.Because it is semiduplex mode, can only there be a side to send, a side receives, and the method raising antijamming capability of the differential level reception of its employing, is adapted at working under the comparison rugged environment.
Described amplifier is measuring amplifier integrated chip AD521.
Described single-chip microcomputer is MSP430F149.
The beneficial effects of the utility model are: by standard couple being placed in tested working heat galvanic couple same temperature environment, obtain the standard temperature signal, by the thermopair data acquisition unit, standard signal and measured signal are changed and be sent at a distance main frame by wireless network, determine the temperature response curve of tested working heat galvanic couple, main frame automatically carries out data analysis and generates calibration record and report.This design can be ignored the impact of the signals collecting generation of secondary instrument, does not affect its normal operation.
The utlity model has portability, in the advantage such as linear, intelligent, being fit to all kinds of measurement technology mechanisms and thermopair uses enterprise to the on-line calibration of thermopair, change original thermocouple calibration and thermopair must have been dismantled the conventional amounts biography mode of censorship, make enterprise produce continuously and be protected, also provide foundation for accurately tracing to the source of thermopair data simultaneously.
Description of drawings
Fig. 1 is functional-block diagram of the present utility model;
Fig. 2 is the functional-block diagram of thermopair data acquisition unit of the present utility model;
Wherein: 1, kiln 2, standard couple 3, thermopair data acquisition unit 4, main frame 5, secondary instrument 6, working heat galvanic couple.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, working heat galvanic couple 6 connecting secondary instrument 5.Working heat galvanic couple 6 one sides at kiln 1 arrange standard couple 2, and working heat galvanic couple 6 is connected the input end of thermopair data acquisition unit 3 with the output terminal of standard couple 2, and the output terminal of some thermopair data acquisition units 3 connects main frame 4 by wireless communication apparatus.
Thermopair data acquisition unit 3 comprises amplifier, A/D converter and single-chip microcomputer, the input end of amplifier connects respectively working heat galvanic couple and standard couple, the output terminal of amplifier connects the input end of A/D converter, the output terminal of A/D converter connects the input end of single-chip microcomputer, and the communication terminal of single-chip microcomputer arranges 485 chips and connects wireless communication apparatus.
Amplifier is measuring amplifier integrated chip AD521.AD521 electric current input bias voltage is 80nA, and the voltage input deviation is 1000 μ V, can adapt to the working environment of (55 ~ 125) ℃.
Single-chip microcomputer is MSP430F149.MSP430 series is the microcontroller of one group of super low-power consumption, is comprised of with the model that disparate modules forms for the different application target multiple.Microcontroller design becomes can use the battery long-term work, supply voltage scope 1.8～3.6V.MSP430F149 has the Flash of 60KB and the RAM of 2KB.Wherein Flash is divided into again 120 sections primary memorys (every section 512B) and two segment information storeies (every section 128B).Flash can wholely wipe also and can segmentation wipe, and this brings great convenience for the design of hardware and software of system and be flexible.In view of capacity and the characteristics of single-chip microcomputer storer, outside without extended memory and I/O mouth, peripherals is simplified.The operating voltage of MSP430F149 is 3.3V, and therefore, its I/O level is also the 3.3V logic level, and compatible with the 5V Transistor-Transistor Logic level.MSP430F149 has dual serial asynchronous communication mouth.
Principle of work and use procedure:
In the kiln temperature control system, secondary instrument is converted into temperature signal with the thermopower that the working heat galvanic couple provides; And feed back to temperature control system by control device and guarantee the stable of kiln temperature.And be only collection signal at the thermopair data acquisition unit in parallel with secondary instrument, not with the temperature control signal conflict; Data show by experiment, and the impact that temperature control is produced in parallel can be ignored.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that do not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (4)
1. thermopair in-line calibration calibration system, comprise working heat galvanic couple connecting secondary instrument, it is characterized in that: working heat galvanic couple one side at kiln arranges standard couple, the working heat galvanic couple is connected the input end of thermopair data acquisition unit with the output terminal of standard couple, the output terminal of some thermopair data acquisition units connects main frame by wireless communication apparatus.
2. thermopair in-line calibration calibration system according to claim 1, it is characterized in that: described thermopair data acquisition unit comprises amplifier, A/D converter and single-chip microcomputer, the input end of amplifier connects respectively working heat galvanic couple and standard couple, the output terminal of amplifier connects the input end of A/D converter, the output terminal of A/D converter connects the input end of single-chip microcomputer, and the communication terminal of single-chip microcomputer arranges 485 chips and connects wireless communication apparatus.
3. thermopair in-line calibration calibration system according to claim 2, it is characterized in that: described amplifier is measuring amplifier integrated chip AD521.
4. thermopair in-line calibration calibration system according to claim 2, it is characterized in that: described single-chip microcomputer is MSP430F149.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220749487 CN202974509U (en) | 2012-12-29 | 2012-12-29 | Thermocouple online verification and calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220749487 CN202974509U (en) | 2012-12-29 | 2012-12-29 | Thermocouple online verification and calibration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202974509U true CN202974509U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220749487 Expired - Fee Related CN202974509U (en) | 2012-12-29 | 2012-12-29 | Thermocouple online verification and calibration system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202974509U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748890A (en) * | 2015-03-24 | 2015-07-01 | 上海理工大学 | Thermocouple detecting device |
| CN106482870A (en) * | 2016-11-24 | 2017-03-08 | 攀枝花学院 | Wolfram rhenium heat electric couple examines and determine data collecting system |
| CN113125032A (en) * | 2019-12-30 | 2021-07-16 | 联合汽车电子有限公司 | Response measurement system and measurement method of motor temperature monitoring system |
-
2012
- 2012-12-29 CN CN 201220749487 patent/CN202974509U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748890A (en) * | 2015-03-24 | 2015-07-01 | 上海理工大学 | Thermocouple detecting device |
| CN106482870A (en) * | 2016-11-24 | 2017-03-08 | 攀枝花学院 | Wolfram rhenium heat electric couple examines and determine data collecting system |
| CN113125032A (en) * | 2019-12-30 | 2021-07-16 | 联合汽车电子有限公司 | Response measurement system and measurement method of motor temperature monitoring system |
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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: 20130605 Termination date: 20131229 |