CN201886075U - Current signal collection module - Google Patents
Current signal collection module Download PDFInfo
- Publication number
- CN201886075U CN201886075U CN2010206637913U CN201020663791U CN201886075U CN 201886075 U CN201886075 U CN 201886075U CN 2010206637913 U CN2010206637913 U CN 2010206637913U CN 201020663791 U CN201020663791 U CN 201020663791U CN 201886075 U CN201886075 U CN 201886075U
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- current signal
- microprocessor
- circuit
- acquisition module
- signal acquisition
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Abstract
The utility model relates to a current signal collection module which comprises a power source, a microprocessor, a CAN bus unit, a photoelectric isolation circuit, an A/D converting circuit and a multiple selector. At least one data collection transmitter for converting through a current/voltage converting resistance circuit is correspondingly arranged at the input terminal of the multiple selector; the output terminal of the multiple selector is connected with the input terminal of the A/D converting circuit; the output terminal of the A/D converting circuit is connected with the input terminal of the microprocessor through the photoelectric isolation circuit; and the microprocessor is communicated and connected with an external main controller through the CAN bus unit. The current signal collection module collects transmitted digital quantity signals, and a collection part adopts the photoelectric isolation circuit, and the disturbance resisting capacity is high during collection and transmission processes; the current signal collection module can be installed near to a data collection sensor to collect signals, and a two-core communication cable can be used for transmitting the signals, so that the cost is saved; and simultaneously the module can be connected with a computer and an intelligent instrument through the CAN bus unit.
Description
Technical field
The utility model relates to a kind of data acquisition module, relates in particular to a kind of current signal acquisition module.
Background technology
Existing data acquisition module is generally gathered analog signals, if system head's Distance Transmission analog signals, the poor anti jamming capability of system can be interfered and influences display precision, can only show one road signal, can't carry out interface with computing machine; In addition, the sensor of use can only connect instrument separately, and where instrument just needs toward corresponding local cable laying, and each sensor need connect a two core cable, and the number of cables that needs is many.
The utility model content
The purpose of this utility model provides a kind of current signal acquisition module, to solve the problem that existing current signal acquisition module is brought.
For achieving the above object, the utility model adopts following technical scheme: a kind of current signal acquisition module, comprise power supply, microprocessor, the CAN bus unit, photoelectric isolating circuit, A/D change-over circuit and MUX, the input end correspondence of described MUX is provided with leads up to the data acquisition transmitter of current/voltage-converted resistance circuit conversion at least, the output terminal of described MUX is connected into the input end of A/D change-over circuit, the output terminal of described A/D change-over circuit is connected in the input end of microprocessor by photoelectric isolating circuit, and described microprocessor is used for being connected with the communication of external piloting control system device by the CAN bus unit.
Also be connected with eeprom memory on the described microprocessor.
Also be connected with watchdog circuit on the described microprocessor.
Described data acquisition transmitter adopts the two-wire system pressure unit.
Described microprocessor is an embedded controller.
Described MUX is 16 to select 1 channel to channel adapter.
What current signal acquisition module collection of the present utility model was transmitted is digital quantity signal, and collecting part employing photoelectric isolating circuit, and antijamming capability is strong in collection and the transmission course, and long transmission distance, total system can not cause fault to enlarge because of crosstalk yet; In addition, can be contained near the data sampling sensor acquired signal nearby, a module can be gathered 16 road signals simultaneously, only needs one two core communication cable and transmit this signal, saves cost; Simultaneously can pass through CAN bus unit and computer interface, also can with the intelligence instrument interface.
Description of drawings
Fig. 1 is the schematic diagram of the utility model current signal acquisition module.
Embodiment
Below in conjunction with specific embodiment the utility model is done further introduction.
Be illustrated in figure 1 as the schematic diagram of a kind of 4～20mA current signal of the utility model acquisition module embodiment, comprise power supply, microprocessor, CAN bus unit, photoelectric isolating circuit, A/D change-over circuit and MUX MUX.The microprocessor of present embodiment is an embedded controller, MUX is 16 to select 1 channel to channel adapter, be that its input end correspondence is provided with 16 acquisition channels, correspondence is provided with data and gathers transmitter collection corresponding signal on each acquisition channel, and convert current signal to voltage signal by the current/voltage-converted circuit of relative set on the acquisition channel, wherein, the data acquisition transmitter of present embodiment adopts the two-wire system pressure unit, gather current signal, the current/voltage-converted resistance circuit adopts accurate sampling resistor; The output terminal of MUX is connected into the input end of A/D change-over circuit, microprocessor is connected by the output terminal of photoelectric isolating circuit with the A/D change-over circuit, microprocessor is connected with the communication of external piloting control system device by the CAN bus unit, the data of gathering is transferred to the computing machine or the digital instrument of master controller by data bus.
In addition, for making the module data storage more convenient, this analog output module also comprises eeprom memory, and this eeprom memory links to each other with embedded controller; The watchdog circuit that connection is set on the embedded controller further guarantees the stability of whole module work; Photoelectric isolating circuit the antijamming capability that has strengthened output module is set.
This module controls adopts microprocessor technology, the accurate sampling resistor of the current signal of 4-20mA by the collection of 4-20mA pressure unit by relative set changed into voltage signal, convert analog quantity to digital quantity signal by A/D convertor circuit, give microprocessor by photoelectric isolating circuit again, microprocessor sends the form of the analog signals that collects with digital quantity through handling by the CAN bus unit.Computing machine or digital instrument can be accepted the data that this module sends and show.Even the EEROM storer is used for storing the parameter power-off is set also can lose of this module, house dog is used for monitor microprocessors, restarts microprocessor if system breaks down.Power supply unit mainly provides the working power of whole module.
The utility model current signal collection module has following advantage: whole module adopts modularized design, functional module miniaturization standardization, and configuration is convenient, is convenient to change and maintenance; Realize 16 channel data collections; Can export data by the data/address bus mode; Adopt photoelectric isolation technology, PORT COM, microprocessor, output channel are isolated fully.
Claims (6)
1. current signal acquisition module, it is characterized in that: comprise power supply, microprocessor, the CAN bus unit, photoelectric isolating circuit, A/D change-over circuit and MUX, the input end correspondence of described MUX is provided with leads up to the data acquisition transmitter of current/voltage-converted resistance circuit conversion at least, the output terminal of described MUX is connected into the input end of A/D change-over circuit, the output terminal of described A/D change-over circuit is connected in the input end of microprocessor by photoelectric isolating circuit, and described microprocessor is used for being connected with the communication of external piloting control system device by the CAN bus unit.
2. current signal acquisition module according to claim 1 is characterized in that: also be connected with eeprom memory on the described microprocessor.
3. current signal acquisition module according to claim 1 is characterized in that: also be connected with watchdog circuit on the described microprocessor.
4. current signal acquisition module according to claim 1 is characterized in that: described data acquisition transmitter adopts the two-wire system pressure unit.
5. according to any described current signal acquisition module of claim 1～4, it is characterized in that: described microprocessor is an embedded controller.
6. according to the current signal acquisition module of claim 5, it 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 |
|---|---|---|---|
| CN2010206637913U CN201886075U (en) | 2010-12-16 | 2010-12-16 | Current signal collection module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206637913U CN201886075U (en) | 2010-12-16 | 2010-12-16 | Current signal collection module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886075U true CN201886075U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206637913U Expired - Fee Related CN201886075U (en) | 2010-12-16 | 2010-12-16 | Current signal collection module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886075U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628891A (en) * | 2012-04-28 | 2012-08-08 | 航天科技控股集团股份有限公司 | Detection system and detection method for positive-inverse current single loop based on controller area network (CAN) |
| CN102944736A (en) * | 2012-11-22 | 2013-02-27 | 江苏大为科技股份有限公司 | Circuit for detecting wide-range, high-precision and multichannel currents based on optical couplings |
| CN105511351A (en) * | 2015-12-09 | 2016-04-20 | 泉州市冠航达电子科技有限公司 | Industrial field CAN bus isolation data acquisition module |
| CN106678064A (en) * | 2016-11-30 | 2017-05-17 | 金华尼兰科技有限公司 | Electronic vacuum pump with self-protection function |
| CN109445347A (en) * | 2018-11-16 | 2019-03-08 | 美钻深海能源科技研发（上海）有限公司 | A kind of digital display unit and its display methods of collection in worksite signal |
| CN110083564A (en) * | 2019-06-14 | 2019-08-02 | 北京锐达芯集成电路设计有限责任公司 | A kind of control chip and its application method |
| CN112542743A (en) * | 2020-12-15 | 2021-03-23 | 昇辉控股有限公司 | Intelligent socket |
| CN115903559A (en) * | 2021-09-30 | 2023-04-04 | 国能智深控制技术有限公司 | Controller |
-
2010
- 2010-12-16 CN CN2010206637913U patent/CN201886075U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628891A (en) * | 2012-04-28 | 2012-08-08 | 航天科技控股集团股份有限公司 | Detection system and detection method for positive-inverse current single loop based on controller area network (CAN) |
| CN102944736A (en) * | 2012-11-22 | 2013-02-27 | 江苏大为科技股份有限公司 | Circuit for detecting wide-range, high-precision and multichannel currents based on optical couplings |
| CN105511351A (en) * | 2015-12-09 | 2016-04-20 | 泉州市冠航达电子科技有限公司 | Industrial field CAN bus isolation data acquisition module |
| CN106678064A (en) * | 2016-11-30 | 2017-05-17 | 金华尼兰科技有限公司 | Electronic vacuum pump with self-protection function |
| CN109445347A (en) * | 2018-11-16 | 2019-03-08 | 美钻深海能源科技研发（上海）有限公司 | A kind of digital display unit and its display methods of collection in worksite signal |
| CN110083564A (en) * | 2019-06-14 | 2019-08-02 | 北京锐达芯集成电路设计有限责任公司 | A kind of control chip and its application method |
| CN112542743A (en) * | 2020-12-15 | 2021-03-23 | 昇辉控股有限公司 | Intelligent socket |
| CN115903559A (en) * | 2021-09-30 | 2023-04-04 | 国能智深控制技术有限公司 | Controller |
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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: 20110629 Termination date: 20121216 |