CN103135633A - Multipoint temperature measurement controller - Google Patents
Multipoint temperature measurement controller Download PDFInfo
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- CN103135633A CN103135633A CN2013100325653A CN201310032565A CN103135633A CN 103135633 A CN103135633 A CN 103135633A CN 2013100325653 A CN2013100325653 A CN 2013100325653A CN 201310032565 A CN201310032565 A CN 201310032565A CN 103135633 A CN103135633 A CN 103135633A
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- China
- Prior art keywords
- temperature measuring
- optocoupler
- single chip
- sja1000
- chip computer
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Abstract
The invention discloses a multipoint temperature measuring controller and relates to a temperature measuring device. The multipoint temperature measuring controller is formed by a housing and a control circuit board, wherein a K-type thermocouple temperature measuring circuit which is formed by MAX6675, a temperature control circuit which is formed by AD7528 and a controller area network (CAN) interface circuit which is formed by a CAN controller SJA1000, a CAN transceiver PCA82C250 and an optocoupler 6N137 are arranged on the control circuit board. The circuit board which is formed by the circuits is arranged in the housing to form a whole, the measurement and control of a multipoint temperature signal can be achieved. The multipoint temperature measuring controller is simple in structure, high in sample data reliability and suitable for industrial process control.
Description
Technical field
The present invention relates to a kind of temperature measuring equipment, particularly a kind of temperature measurement controller with CAN interface.
Background technology
Temperature measure and control obtains a wide range of applications in commercial production, especially in the industrial circles such as oil, chemical industry, electric power, metallurgy, is undertaking very important TT﹠C task.In order to realize measurement and the control to temperature, the CAN bus is applied to the multi-point temp TT﹠C system, the multi way temperature telemetry circuit is designed to the CAN bus node, and computing machine is responsible for monitoring the duty of each node, and original centralized control system is improved to Distributed Control System (DCS).Realize multi-point temp observing and controlling, make whole TT﹠C system structure simpler, the sampled data reliability is higher, and is suitable for temperature survey and the control of industrial process under multiple environment.
Summary of the invention
The purpose of this invention is to provide a kind of multipoint temperature measuring controller, controller is made of single-chip microcomputer, multi-point temp telemetry circuit, CANBUS interface circuit, simple in structure, the sampled data reliability is high, is suitable for temperature survey and the control of industrial process under multiple environment.
The objective of the invention is to be achieved through the following technical solutions:
A kind of multipoint temperature measuring controller is comprised of housing, control circuit board, its control circuit board is provided with by MAX6675 and consists of K type electric thermo-couple temperature metering circuit, the temperature-control circuit that is consisted of by AD7528, the CAN interface circuit that is consisted of by CAN SJA1000Controler, CAN transceiver PCA82C250 and optocoupler 6N137; The serial data output line SO of MAX6675 is connected with the P1.2 of single chip computer AT 89C52, MAX6675's
End is connected with the P1.1 of single chip computer AT 89C52, and the SCK end of MAX6675 is connected with the P1.0 of single chip computer AT 89C52; The D0 of AD7528～D7 end is connected with P0.0～P0.7 of single chip computer AT 89C52, and the data port AD0 of CAN SJA1000Controler～AD7 is connected with P0.0～P0.7 of AT89C52, and the TXD end of 82C250 and the V0 end of optocoupler 6N137 are connected.
Described a kind of multipoint temperature measuring controller, described AD7528's
End is with single chip computer AT 89C52's
Be connected, AD7528's
End is connected with the P3.7 of single chip computer AT 89C52.
Described a kind of multipoint temperature measuring controller, the INT of described SJA1000 and AT89C52's
Be connected, SJA1000's
Be connected with the P2.7 of AT89C52.
Described a kind of multipoint temperature measuring controller, the TX0 of described SJA1000 is connected with the CATHODE end of optocoupler 6N137 by resistance R 0, the RX0 of SJA1000 is connected with the V0 end of optocoupler 6N137, and the RX1 of SJA1000 holds with the GND of optocoupler 6N137 the ground connection that is connected by resistance R 3.
Described a kind of multipoint temperature measuring controller, the RXD end of described 82C250 is connected by the CATHODE end of resistance R 11 and optocoupler 6N137, and the CANH end of 82C250 and CANL end are as CANBUS.
Advantage of the present invention and effect are:
Temperature controller of the present invention is made of single-chip microcomputer, multi-point temp telemetry circuit, CANBUS interface circuit, and is simple in structure, and the sampled data reliability is high, is suitable for industrial process multi-point temp observing and controlling under multiple environment.
Description of drawings
Fig. 1 is multimetering control circuit schematic diagram of the present invention;
Fig. 2 is CANBUS interface circuit schematic diagram of the present invention.
Embodiment
In Fig. 1 multimetering control circuit figure, the P1.2 of single chip computer AT 89C52 is connected with the SO of MAX6675 end, and receive MAX6675 and send the A/D translation data, the P1.1 of single chip computer AT 89C52 and MAX6675's
End is connected, and the P1.0 of single chip computer AT 89C52 is connected with the SCK of MAX6675 end; Two-way, 8, the D0 of parallel port digital to analog converter AD7528～D7 end are connected with P0.0～P0.7 of single chip computer AT 89C52, AD7528's
End is with single chip computer AT 89C52's
Be connected, AD7528's
End is connected with the P3.7 of single chip computer AT 89C52, the control input end
For low level DACA be loaded, the control input end
For high level DACB be loaded, realize temperature measure and control.
In Fig. 2 CANBUS interface circuit, the P0.0 of the data-interface AD0 of CAN SJA1000Controler～AD7 pin and AT89C52-P0.7 pin is connected, SJA1000's
End is connected with the P2.7 pin of AT89C52, and the INT end of SJA1000 is with AT89C52's
End is connected, and adopts interrupt mode to transmit and receive data; The TX0 of SJA1000 holds by resistance R 0 and is connected with the CATHODE end of optocoupler 6N137, and the RX0 of SJA1000 is connected with the V0 end of optocoupler 6N137, and the RX1 of SJA1000 holds with the GND of optocoupler 6N137 the ground connection that is connected by resistance R 3; The TXD end of CAN transceiver 82C250 and the V0 end of optocoupler 6N137 are connected, and the RXD end of 82C250 is connected by the CATHODE end of resistance R 11 and optocoupler 6N137, improves CAN bus antijamming capability, and the CANH end of 82C250 and CANL end are as CANBUS.
The present invention includes housing, control circuit board, foregoing circuit built-up circuit plate is placed on and consists of whole measurement and the control that can realize the multi-point temp signal in housing.
Claims (5)
1. a multipoint temperature measuring controller is comprised of housing, control circuit board, it is characterized in that, control circuit board is provided with by MAX6675 and consists of K type electric thermo-couple temperature metering circuit, the temperature-control circuit that is consisted of by AD7528, the CAN interface circuit that is consisted of by CAN SJA1000Controler, CAN transceiver PCA82C250 and optocoupler 6N137; The serial data output line SO of MAX6675 is connected with the P1.2 of single chip computer AT 89C52, MAX6675's
End is connected with the P1.1 of single chip computer AT 89C52, and the SCK end of MAX6675 is connected with the P1.0 of single chip computer AT 89C52; The D0 of AD7528～D7 end is connected with P0.0～P0.7 of single chip computer AT 89C52, and the data port AD0 of CAN SJA1000Controler～AD7 is connected with P0.0～P0.7 of AT89C52, and the TXD end of 82C250 and the V0 end of optocoupler 6N137 are connected.
2. according to a kind of multipoint temperature measuring controller claimed in claim 1, it is characterized in that, described AD7528's
End is with single chip computer AT 89C52's
Be connected, AD7528's
End is connected with the P3.7 of single chip computer AT 89C52.
3. according to a kind of multipoint temperature measuring controller claimed in claim 1, it is characterized in that, the INT of described SJA1000 and AT89C52's
Be connected, SJA1000's
Be connected with the P2.7 of AT89C52.
4. according to a kind of multipoint temperature measuring controller claimed in claim 1, it is characterized in that, the TX0 of described SJA1000 is connected with the CATHODE end of optocoupler 6N137 by resistance R 0, the RX0 of SJA1000 is connected with the V0 end of optocoupler 6N137, and the RX1 of SJA1000 holds with the GND of optocoupler 6N137 the ground connection that is connected by resistance R 3.
5. according to a kind of multipoint temperature measuring controller claimed in claim 1, it is characterized in that, the RXD end of described 82C250 is connected by the CATHODE end of resistance R 11 and optocoupler 6N137, and the CANH end of 82C250 and CANL end are as CANBUS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100325653A CN103135633A (en) | 2013-01-29 | 2013-01-29 | Multipoint temperature measurement controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100325653A CN103135633A (en) | 2013-01-29 | 2013-01-29 | Multipoint temperature measurement controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103135633A true CN103135633A (en) | 2013-06-05 |
Family
ID=48495602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100325653A Pending CN103135633A (en) | 2013-01-29 | 2013-01-29 | Multipoint temperature measurement controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103135633A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201331392Y (en) * | 2009-01-12 | 2009-10-21 | 佳木斯大学 | Intelligent multi-point temperature measurement transmitter |
| US20100076605A1 (en) * | 2008-09-19 | 2010-03-25 | Johnson Controls Technology Company | HVAC System Controller Configuration |
| CN202372203U (en) * | 2011-10-17 | 2012-08-08 | 陕西理工学院 | Temperature and humidity measuring device based on CAN (Controller Area Network) bus |
| CN203117815U (en) * | 2013-01-29 | 2013-08-07 | 沈阳化工大学 | Multipoint temperature measuring controller |
-
2013
- 2013-01-29 CN CN2013100325653A patent/CN103135633A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100076605A1 (en) * | 2008-09-19 | 2010-03-25 | Johnson Controls Technology Company | HVAC System Controller Configuration |
| CN201331392Y (en) * | 2009-01-12 | 2009-10-21 | 佳木斯大学 | Intelligent multi-point temperature measurement transmitter |
| CN202372203U (en) * | 2011-10-17 | 2012-08-08 | 陕西理工学院 | Temperature and humidity measuring device based on CAN (Controller Area Network) bus |
| CN203117815U (en) * | 2013-01-29 | 2013-08-07 | 沈阳化工大学 | Multipoint temperature measuring controller |
Non-Patent Citations (1)
| Title |
|---|
| 孙立红: "多点温度测控系统的设计", 《仪表技术与传感器》 * |
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Application publication date: 20130605 |