CN201853131U - Thermal resistor signal acquisition module - Google Patents
Thermal resistor signal acquisition module Download PDFInfo
- Publication number
- CN201853131U CN201853131U CN201020645803XU CN201020645803U CN201853131U CN 201853131 U CN201853131 U CN 201853131U CN 201020645803X U CN201020645803X U CN 201020645803XU CN 201020645803 U CN201020645803 U CN 201020645803U CN 201853131 U CN201853131 U CN 201853131U
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- Prior art keywords
- acquisition module
- thermal resistance
- microprocessor
- signal acquisition
- bus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model relates to a thermal resistor signal acquisition module, which comprises a power source, a microprocessor, a CAN (controller area network) communication interface, an analog-to-digital converter and a multi-channel selector. The microprocessor is in communication with an external main controller through the CAN communication interface, and is connected with the multi-channel selector through the analog-to-digital converter. The multi-channel selector is provided with at least two acquisition paths for acquiring thermal resistor signals. The CAN communication interface is connected with an external main controller in a communication mode. Since the CAN bus technology is based on an ISO (international standardization organization)/OSI (open system interconnection reference), has a complete software support system, and accordingly is capable of solving the problems of bus control, collision detection, link maintenance and the like. The CAN bus provides powerful technical support for real-time reliable data communication among nodes of a distributed control system. The thermal resistor signal acquisition module adopting the CAN bus is low in cost, high in speed and flexible in use and has long transmission distance.
Description
Technical field
The utility model relates to a kind of data acquisition circuit, especially a kind of thermal resistance signal acquisition module.
Background technology
Need the in-site modeling signal is gathered and handled in the industrial process control, the basic collection of simulant signal AD equipment that is used for industrial process control has three classes: thermal resistance input equipment, thermopair input equipment and transducer signal input equipment, wherein thermal resistance is the most frequently used a kind of Temperature Detector of middle low-temperature space, principal feature is the measuring accuracy height, stable performance.The acquisition module of gathering for the signal of thermal resistance generally all is to adopt the RS485 communication interface, supports the MODBUS-RTU agreement, with the communication of realization with host computer.Owing to the limitation of RS485 communication interface itself has limited mutual communication between sampling module and host computer or the sampling module.
Summary of the invention
The purpose of this utility model provides a kind of thermal resistance signal acquisition module, uses the RS485 communication interface to be brought communication problem between sampling module and host computer or the sampling module in the existing acquisition module to solve.
For achieving the above object, the utility model thermal resistance signal acquisition module, comprise power supply, microprocessor, CAN bus module, optoisolator, analog to digital converter and MUX, at least two of the input end settings of described MUX are used to gather the acquisition channel of thermal resistance signal, the output terminal of MUX is connected into the input end of analog to digital converter, the output terminal of analog to digital converter links to each other with the input end of optoisolator, the output terminal of optoisolator is connected into microprocessor, and this microprocessor is connected with the communication of external piloting control system device by the CAN bus module.
Further, the thermal resistance acquisition module also comprises eeprom memory, and this eeprom memory links to each other with described microprocessor.
Further, also be connected with watchdog circuit on the described microprocessor.
Further, described microprocessor is an embedded controller.
Further, described MUX is 16 to select 1 channel to channel adapter.
Adopting the CAN bus to carry out communication with external piloting control system device in the thermal resistance acquisition module of the present utility model is connected, because the CAN bussing technique is based on the ISO/OSI model, have complete software support system, can solve problems such as total line traffic control, collision detection, link maintenance; The CAN bus apparatus becomes net automatically, the branch of dereliction/slave unit or allow many main memories to exist; The product of different manufacturers can exchange on same level, has interoperability between the equipment; The CAN bus provides powerful technical support for dcs realizes real-time between each node, data communication reliably; Owing to high-performance and the reliability of CAN is widely used in aspects such as industrial automation, boats and ships, Medical Devices, commercial unit.And the thermal resistance acquisition module cost that adopts the CAN bus is low, speed fast, use flexible, long transmission distance.Sampled light isolator technology makes acquisition channel, PORT COM, microprocessor isolate fully, and the antijamming capability of acquisition module strengthens.
Description of drawings
Fig. 1 is the thermal resistance acquisition module theory diagram of the utility model embodiment.
Embodiment
Be illustrated in figure 1 as the schematic diagram of the utility model thermal resistance acquisition module embodiment, thermal resistance adopts the PT100 thermal resistance among this embodiment.This thermal resistance acquisition module comprises stabilized voltage supply, microprocessor, CAN bus module, eeprom memory, optoisolator, analog to digital converter ADC and MUX MUX, stabilized voltage supply provides working power for above components and parts, microprocessor is an embedded controller, and eeprom memory links to each other with embedded controller.The input end of MUX MUX is provided with 16 acquisition channels, and promptly MUX is 16 to select 1 channel to channel adapter, is connected with the PT100 thermal resistance on the acquisition channel of MUX respectively to gather thermal resistance signal.MUX is gathered the PT100 thermal resistance signal is connected into analog to digital converter ADC by the output terminal of MUX input end, after analog to digital conversion, be connected into the input end of optoisolator by output terminal, the output terminal of optoisolator is connected into embedded controller, this embedded controller deposits signal in the eeprom memory in, and by the CAN bus module signal is uploaded external piloting control system device.Be provided with optoisolator between embedded controller and the analog to digital converter ADC, be used to strengthen the antijamming capability of acquisition module.Also be connected with watchdog circuit on the embedded controller.
Claims (5)
1. thermal resistance signal acquisition module, it is characterized in that: comprise power supply, microprocessor, CAN bus module, optoisolator, analog to digital converter and MUX, at least two of the input end settings of described MUX are used to gather the acquisition channel of thermal resistance signal, the output terminal of MUX is connected into the input end of analog to digital converter, the output terminal of analog to digital converter links to each other with the input end of optoisolator, the output terminal of optoisolator is connected into microprocessor, and this microprocessor is connected with the communication of external piloting control system device by the CAN bus module.
2. thermal resistance signal acquisition module according to claim 1 is characterized in that: the thermal resistance acquisition module also comprises eeprom memory, and this eeprom memory links to each other with described microprocessor.
3. thermal resistance signal acquisition module according to claim 1 is characterized in that: also be connected with watchdog circuit on the described microprocessor.
4. according to each described thermal resistance signal acquisition module among the claim 1-3, it is characterized in that: described microprocessor is an embedded controller.
5. thermal resistance signal acquisition module according to claim 4 is characterized in that: described MUX is 16 to select 1 channel to channel adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020645803XU CN201853131U (en) | 2010-12-07 | 2010-12-07 | Thermal resistor signal acquisition module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020645803XU CN201853131U (en) | 2010-12-07 | 2010-12-07 | Thermal resistor signal acquisition module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201853131U true CN201853131U (en) | 2011-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020645803XU Expired - Fee Related CN201853131U (en) | 2010-12-07 | 2010-12-07 | Thermal resistor signal acquisition module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201853131U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713557A (en) * | 2013-12-16 | 2014-04-09 | 上海三一重机有限公司 | Analogue isolation technology based on digital bus |
| CN106404196A (en) * | 2016-11-30 | 2017-02-15 | 南宁学院 | Temperature measurer based on CAN bus |
-
2010
- 2010-12-07 CN CN201020645803XU patent/CN201853131U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713557A (en) * | 2013-12-16 | 2014-04-09 | 上海三一重机有限公司 | Analogue isolation technology based on digital bus |
| CN106404196A (en) * | 2016-11-30 | 2017-02-15 | 南宁学院 | Temperature measurer based on CAN bus |
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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: 20110601 Termination date: 20121207 |