CN103048531A - Current sensor of CAN (controller area network) bus interface for mine - Google Patents
Current sensor of CAN (controller area network) bus interface for mine Download PDFInfo
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- CN103048531A CN103048531A CN2011103101852A CN201110310185A CN103048531A CN 103048531 A CN103048531 A CN 103048531A CN 2011103101852 A CN2011103101852 A CN 2011103101852A CN 201110310185 A CN201110310185 A CN 201110310185A CN 103048531 A CN103048531 A CN 103048531A
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Abstract
The invention relates to the current sensor of a CAN (controller area network) bus interface for a mine. The current sensor consists of a current mutual inductor, a rectifier, an acquisition device, a signal amplifier, a filter, an A/D (analog to digital) converter, the CANBUS interface, a data micro processor, a CAN driving transceiver and a direct current power supply. Firstly, input current is converted into a weak alternating current signal which is convenient to process through the current mutual inductor or the Hall principle, then the weak alternating current signal is subjected to rectification and sampling to obtain a direct current signal and is subjected to certain process of amplification and filtering, highly precise A/D conversion is carried out, the direct current signal is converted into a digital signal, the digital signal is subjected to software filtering and linear software processing, according to the micro processor with strong interference resistance capability and the CANBUS interface, the data is converted into a CANBUS standard data frame, an expanding frame or a CanOpen data frame, the data is output by the adoption of the CANBUS protocol, and finally the data is converted into a CANBUS electrical level signal through a special CAN driving transceiver and is sent.
Description
Technical field:
The present invention relates to a kind of current sensor of mining industry; refer specifically to a kind of mining CAN bus interface current sensor; be mainly used in the power transmission and distribution of coalcutter, development machine, combined switch for mining and detection and the protection of current of electric, measure simultaneously single channel or multichannel (such as three-phase, organize three-phase) current/voltage more.
Background technology:
The output of the sensor of the employings such as coalcutter, development machine, combined switch for mining all is simulating signal at present, and transmission signal line is many, and the distance of transmission is short, easily is disturbed.The analog quantity interface of the control processor of coalcutter, development machine and switchboard assembly is very limited, but needs the information of collection very many again, thereby causes interface not enough, and the information that causes many needs to gather can't gather.
In order to solve the problem that exists in the above technology, the present invention proposes following technical solution.
Summary of the invention:
The present invention is by Current Mutual Inductance coil (or hall band), rectifier, collector, signal amplifier, wave filter, A/D converter, the CANBUS interface, the data microprocessor, CAN drives transceiver and direct supply forms, at first input current is converted to the convenient weak ac current signal of processing through Current Mutual Inductance coil or hall principle, then obtain direct current signal and carry out certain amplification and the filtering processing through overcommutation and sampling, then carry out high-precision A/D conversion, convert thereof into digital signal, again data are carried out software filtering and the processing of linearization software, strong and with the microprocessor of CANBUS interface data are changed into CANBUS normal data frame by antijamming capability, expansion frame or CanOpen Frame adopt CANBUS agreement output data.CAN driving transceiver by special use converts the transmission of CANBUS level signal at last.
Power supply can adopt 24V (reality can be wide the direct supplys such as voltage input 7～40V) or 5V, direct supply changes into digital circuit and required 5V and the 3.3V voltage of microprocessor by the integrated IC of DC-DC, improve conversion efficiency, reduce power consumption, circuit can more stablely be worked for a long time.
It is short to adopt the CANBUS technology to solve analog quantity interface deficiency and the Sensor Analog Relay System amount transmission range of collecting device, the problem such as easily is disturbed.The CANBUS interfacing adopts the digital data transmission data, has improved precision and the anti-interference of data; Can be point-to-point, some multiple spot (in groups) and several modes of overall situation broadcasting are sent data in real time; Interface is simple, and a plurality of CANBUS modules only need a pair of (2) transfer bus, and the Direct Communication distance, and transmission speed is fast, and antijamming capability is strong.
Principal feature of the present invention is:
1, reduce the information acquisition interface (a plurality of CANBUS output current sensors and other CANBUS output module only need a CANBUS port) of equipment, need not the station address coding, replace the communication data coding, the information node number is unrestricted in theory.
2, adopt CAN bus non-destructive arbitration technique, according to priority send number, save the bus collision arbitration time, the assurance data transmission is real-time, can guarantee the performance of information under heavy load that the equipment such as coalcutter, development machine, combined switch for mining need gather, extremely strong error correcting capability adopts the difference transmitting-receiving, can grow Distance Transmission, improve precision and the antijamming capability of data.
3, reduce the data processing links, the rear end collecting device directly gathers the data of CANBUS module, can use.
4, CANBUS adopts short frame structure, and the transmission time is short, and antijamming capability is strong, again the transmitting-receiving time short, reliability is high, real-time is good.
The invention has the beneficial effects as follows the precision and the anti-interference that have improved data, can be point-to-point, some multiple spot (in groups) and several modes of overall situation broadcasting are sent data in real time; Interface is simple, and a plurality of CANBUS modules only need a pair of transfer bus (2), and the Direct Communication distance, and transmission speed is fast, and antijamming capability is strong.
Description of drawings:
Figure (1) is fundamental diagram of the present invention.
Embodiment:
The present invention is by electromagnetic induction magnet ring 1, rectification circuit 2, collector 3, signal amplifier 4, wave filter 5, A/D converter 6, data microprocessor 7, CANBUS interface 8, CAN drives transceiver 9 and direct supply 10 forms, at first input current is converted to the convenient weak ac current signal of processing through electromagnetic induction magnet ring 1 by mutual inductance principle or hall principle, then pass through rectification circuit 2 rectifications, sending signal amplifier 4 to by collector 3 collecting part signals amplifies, carrying out filtering through wave filter 5 again processes, then carry out high-precision a/d converter 6 and convert thereof into digital signal, again data are carried out software filtering and the processing of linearization software, strong and with the data microprocessor 7 of CANBUS interface 8 by antijamming capability, data are changed into CANBUS normal data frame, expansion frame or CanOpen Frame adopt the CANBUS agreement by CANBUS interface 8 output data.CAN driving transceiver 9 by special use converts the transmission of CANBUS level signal at last.
Claims (4)
1. mining CAN bus interface current sensor, formed by Current Mutual Inductance coil, rectifier, collector, signal amplifier, wave filter, A/D converter, CANBUS interface, data microprocessor, CAN driving transceiver and direct supply, it is characterized in that reducing the information acquisition interface of equipment, a plurality of CANBUS output current sensors and other CANBUS output module only need a CANBUS port, need not the station, encode, replace the communication data coding, the information node number is unrestricted in theory.
2. by wanting to ask 1 described a kind of mining CAN bus interface current sensor, it is characterized in that adopting CAN bus non-destructive arbitration technique, according to priority send number, save the bus collision arbitration time, guarantee that data transmission is real-time, can guarantee the performance of information under heavy load that the equipment such as coalcutter, development machine, combined switch for mining need gather, extremely strong error correcting capability, the transmitting-receiving of employing difference can be grown Distance Transmission, has improved precision and the antijamming capability of data.
3. by wanting to ask 1 described a kind of mining CAN bus interface current sensor, it is characterized in that reducing the data processing links, the rear end collecting device directly gathers the data of CANBUS module, can use.
4. by wanting to ask 1 described a kind of mining CAN bus interface current sensor, it is characterized in that CANBUS adopts short frame structure, the transmission time is short, and antijamming capability is strong, again the transmitting-receiving time short, reliability is high, real-time is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103101852A CN103048531A (en) | 2011-10-13 | 2011-10-13 | Current sensor of CAN (controller area network) bus interface for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103101852A CN103048531A (en) | 2011-10-13 | 2011-10-13 | Current sensor of CAN (controller area network) bus interface for mine |
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| Publication Number | Publication Date |
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| CN103048531A true CN103048531A (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103101852A Pending CN103048531A (en) | 2011-10-13 | 2011-10-13 | Current sensor of CAN (controller area network) bus interface for mine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106209548A (en) * | 2016-08-08 | 2016-12-07 | 西安万物互连电子科技有限公司 | A kind of method extending coal-winning machine CAN interface |
| CN108029184A (en) * | 2015-09-17 | 2018-05-11 | 赤多尼科两合股份有限公司 | Power supply unit for bus |
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| US6489693B1 (en) * | 1999-02-15 | 2002-12-03 | Isabellenhutte Heusler Gmbh Kg | Method and device for current monitoring in a current supply system |
| CN101145681A (en) * | 2007-02-09 | 2008-03-19 | 湖南科技大学 | Multi-function integrated relay protection device for mine |
| CN101418688A (en) * | 2007-10-26 | 2009-04-29 | 三一重型装备有限公司 | Intelligent full automatic combine coal mining system |
| CN201323472Y (en) * | 2008-12-19 | 2009-10-07 | 潍坊北大青鸟华光通信技术有限公司 | Distribution transformer monitoring device |
| US20100033165A1 (en) * | 2008-08-06 | 2010-02-11 | Robert Bosch Gmbh | Measuring induced currents on a can bus |
| CN201945641U (en) * | 2010-09-27 | 2011-08-24 | 上海市电力公司 | Distributed electric energy metering device of power transformation and distribution station |
| CN102183687A (en) * | 2011-02-18 | 2011-09-14 | 广西师范大学 | Three-phase power current sensor based on CAN (Controller Area Network) transmission of AC (Alternating Current) sampling |
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2011
- 2011-10-13 CN CN2011103101852A patent/CN103048531A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6489693B1 (en) * | 1999-02-15 | 2002-12-03 | Isabellenhutte Heusler Gmbh Kg | Method and device for current monitoring in a current supply system |
| CN101145681A (en) * | 2007-02-09 | 2008-03-19 | 湖南科技大学 | Multi-function integrated relay protection device for mine |
| CN101418688A (en) * | 2007-10-26 | 2009-04-29 | 三一重型装备有限公司 | Intelligent full automatic combine coal mining system |
| US20100033165A1 (en) * | 2008-08-06 | 2010-02-11 | Robert Bosch Gmbh | Measuring induced currents on a can bus |
| CN201323472Y (en) * | 2008-12-19 | 2009-10-07 | 潍坊北大青鸟华光通信技术有限公司 | Distribution transformer monitoring device |
| CN201945641U (en) * | 2010-09-27 | 2011-08-24 | 上海市电力公司 | Distributed electric energy metering device of power transformation and distribution station |
| CN102183687A (en) * | 2011-02-18 | 2011-09-14 | 广西师范大学 | Three-phase power current sensor based on CAN (Controller Area Network) transmission of AC (Alternating Current) sampling |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108029184A (en) * | 2015-09-17 | 2018-05-11 | 赤多尼科两合股份有限公司 | Power supply unit for bus |
| CN108029184B (en) * | 2015-09-17 | 2020-04-14 | 赤多尼科两合股份有限公司 | Bus user, lamp, bus system, method for operating a bus system, and method for operating a device |
| CN106209548A (en) * | 2016-08-08 | 2016-12-07 | 西安万物互连电子科技有限公司 | A kind of method extending coal-winning machine CAN interface |
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Application publication date: 20130417 |