CN102645264A - Weighing sensor based on CAN (Controller Area Network) bus - Google Patents
Weighing sensor based on CAN (Controller Area Network) bus Download PDFInfo
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- CN102645264A CN102645264A CN2012101102249A CN201210110224A CN102645264A CN 102645264 A CN102645264 A CN 102645264A CN 2012101102249 A CN2012101102249 A CN 2012101102249A CN 201210110224 A CN201210110224 A CN 201210110224A CN 102645264 A CN102645264 A CN 102645264A
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- bus
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- microprocessor
- load cells
- modular converter
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- 238000005303 weighing Methods 0.000 title abstract description 8
- 239000011888 foil Substances 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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Abstract
The invention discloses a weighing sensor based on a CAN (Controller Area Network) bus, which comprises a strain gauge and a microprocessor, wherein the input end of the microprocessor is connected with the strain gauge through an A/D (Analog/Digital) conversion module and a resistance strain type sensor, the output end of the microprocessor is connected with a CAN module through an internal data bus, and the power supply end of the microprocessor is connected with a power supply module through an LDO (Low-drop-out) voltage regulator module and a DC/DC (Direct-current/Direct-current) conversion module; and the power supply end of the A/D conversion module is connected with the output end of the LDO voltage regulator module. The weighing sensor based on the CAN bus disclosed by the invention has the beneficial effects that an analog signal outputted by the resistance strain type sensor is converted into a digital signal of the CAN bus, and the prior RS485 bus is replaced, so that the reliability and the real time of a system are improved, the later maintenance cost is reduced, and the industrial practical application is better satisfied.
Description
Technical field
The present invention relates to a kind of digital weighing sensor, relate in particular to a kind of LOAD CELLS based on the CAN bus.
Background technology
The digital LOAD CELLS that present a lot of weighing apparatus producer makes, mostly the interface of employing is the RS485 bus.Because many limitation that RS485 bus itself exists, the RS485 bus efficiency is low, and system real time is poor, and the reliability of communication is low, shortcomings such as later maintenance cost height.Therefore, be necessary existing digital LOAD CELLS is improved, the LOAD CELLS based on the CAN bus is provided, improve system reliability, real-time, reduce later maintenance cost, satisfy industry practice better and use.
Summary of the invention
Technical matters to be solved by this invention provides a kind of LOAD CELLS based on the CAN bus, can improve system reliability, real-time, reduces later maintenance cost, satisfies industry practice better and uses.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of LOAD CELLS based on the CAN bus; Comprise foil gauge and microprocessor; Wherein, The input end of said microprocessor links to each other with foil gauge through A/D modular converter, resistance strain type sensor, and its output terminal links to each other with the CAN module through internal data bus, and its power end links to each other with power module through LDO Voltage stabilizing module, DC/DC modular converter; The power end of said A/D modular converter links to each other with the output terminal of LDO Voltage stabilizing module.
Above-mentioned LOAD CELLS based on the CAN bus, wherein, said power module input 220V ac voltage signal, output 8.5～38V d. c. voltage signal; Said DC/DC modular converter input 8.5～38V d. c. voltage signal, output 5V d. c. voltage signal.
Above-mentioned LOAD CELLS based on the CAN bus, wherein, the connection terminal of said foil gauge sticks on the diaphragm through silicon rubber, and said connection terminal is fixed in the wire connection cavity, has charged fluid sealant in the said wire connection cavity.
The present invention contrasts prior art has following beneficial effect: the LOAD CELLS based on the CAN bus provided by the invention; With the analog signal conversion of resistance strain weighing transducer output is the digital signal of CAN bus; Replace existing RS485 bus; Thereby improve system reliability, real-time, reduce later maintenance cost, satisfy industry practice better and use.In addition, the present invention becomes the wide voltage input of 8.5～38V with the input voltage range of LOAD CELLS, satisfies industry practice and uses, and need not instrument power supply, improves the maximum number that connects.
Description of drawings
Fig. 1 is the LOAD CELLS circuit block diagram that the present invention is based on the CAN bus;
Fig. 2 is the LOAD CELLS forward cross-sectional view that the present invention is based on the CAN bus;
Fig. 3 is the LOAD CELLS side direction cross-sectional view that the present invention is based on the CAN bus.
Among the figure:
1 elastic body, 2 overcoats, 3 foil gauges
4 elastic modulus resistance, 5,6 connection terminals, 7 diaphragms
8 joints, 9 cables, 10 cable splices
11 Cross Recess Head Screws, 12 labels, 13 digital modules
20 resistance strain type sensor 21A/D modular converters, 22 power modules
23DC/DC modular converter 24LDO Voltage stabilizing module 25 microprocessors
26CAN module 27CAN bus 28EEPROM module
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
Fig. 1 is the LOAD CELLS circuit block diagram that the present invention is based on the CAN bus.
See also Fig. 1; LOAD CELLS based on the CAN bus provided by the invention comprises foil gauge 3 and microprocessor 25; Wherein, The input end of microprocessor 25 links to each other with foil gauge 3 through A/D modular converter 21, resistance strain type sensor 20, and its output terminal links to each other with CAN module 26 through internal data bus, and its power end links to each other with power module 22 through LDO Voltage stabilizing module 24, DC/DC modular converter 23; The power end of A/D modular converter 21 links to each other with the output terminal of LDO Voltage stabilizing module 24.Microprocessor 25 can be selected 51 single-chip microcomputers commonly used or ARM chip for use, and microprocessor 25 can connect EEPROM module 28 storage datas.
LOAD CELLS based on the CAN bus provided by the invention, wherein, power module 22 input 220V ac voltage signals, output 8.5～38V d. c. voltage signal; DC/DC modular converter 23 inputs 8.5～38V d. c. voltage signal, output 5V d. c. voltage signal.LDO Voltage stabilizing module 24, low dropout regulator means low pressure difference linear voltage regulator, and LDO is a kind of linear voltage regulator.Linear voltage regulator uses transistor or the FET that in its range of linearity, moves, and from the input voltage of using, deducts the voltage that exceeds the quata, and produces the output voltage through overregulating.So-called pressure drop voltage is meant that voltage stabilizer maintains its ratings required input voltage and the minimum value of output voltage difference within the 100mV up and down with output voltage.Can select the chip of following producer: ROHM at present for use, RICOH, Diodes, Ame, TI, NS, Maxim, LTC, Intersil, Fairchild, Micrel, Natlinea r, MPS, AATI, ACE etc.
Fig. 2 is the LOAD CELLS forward cross-sectional view that the present invention is based on the CAN bus; Fig. 3 is the LOAD CELLS side direction cross-sectional view that the present invention is based on the CAN bus.
Please continue referring to Fig. 2 and Fig. 3, the LOAD CELLS based on the CAN bus provided by the invention, wherein, the connection terminal 5,6 of foil gauge 3 sticks on the diaphragm 7 through silicon rubber, and connection terminal 5,6 is fixed in the wire connection cavity, has charged fluid sealant in the said wire connection cavity.The flexible body of foil gauge 3 peripheral hardwares 1, elastic modulus resistance 3 and overcoat 2.Whole digital module 13 comprises that A/D modular converter 21, power module 22, DC/DC modular converter 23, LDO Voltage stabilizing module 24, microprocessor 25 and CAN module 26 are placed in the overcoat 2.Overcoat 2 is provided with joint 8, and cable 9 passes joint 8 and links to each other with cable splice 10, and cable splice 10 comprises power lead V+ and V-, data line CAN-H and CAN-L.Can be provided with label 12 outside the overcoat 2, label 12 can be fixed on the overcoat 2 through Cross Recess Head Screw 11.
In sum; LOAD CELLS based on the CAN bus provided by the invention; At inner A/D modular converter 21, the microprocessor 25 of adding of simulation LOAD CELLS, the circuit board that LDO Voltage stabilizing module 24 and CAN interface etc. are formed, and in addition software processes and the CAN bus LOAD CELLS realized.CAN bus LOAD CELLS can a plurality of interconnected and cooperation weighing instrument or weighing systems of PC composition.Concrete advantage is following: 1) improve system reliability, and can be because of the erroneous effects bus work of individual product in the system.2) improve system real time, adopt how main competitive mode bus structure, strengthen the data communication real-time.3) reduce later maintenance cost, system maintenance easy.4) use than wide-voltage range work, satisfy industry practice and use, need not instrument power supply, improve the maximum number that connects.
Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.
Claims (3)
1. LOAD CELLS based on the CAN bus; Comprise foil gauge (3) and microprocessor (25); It is characterized in that; The input end of said microprocessor (25) links to each other with foil gauge (3) through A/D modular converter (21), resistance strain type sensor (20), and its output terminal links to each other with CAN module (26) through internal data bus, and its power end links to each other with power module (22) through LDO Voltage stabilizing module (24), DC/DC modular converter (23); The power end of said A/D modular converter (21) links to each other with the output terminal of LDO Voltage stabilizing module (24).
2. the LOAD CELLS based on the CAN bus as claimed in claim 1 is characterized in that, said power module (22) input 220V ac voltage signal, output 8.5～38V d. c. voltage signal; Said DC/DC modular converter (23) input 8.5～38V d. c. voltage signal, output 5V d. c. voltage signal.
3. the LOAD CELLS based on the CAN bus as claimed in claim 1; It is characterized in that; The connection terminal of said foil gauge (3) (5,6) sticks on the diaphragm (7) through silicon rubber, and said connection terminal (5,6) is fixed in the wire connection cavity, has charged fluid sealant in the said wire connection cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101102249A CN102645264A (en) | 2012-04-16 | 2012-04-16 | Weighing sensor based on CAN (Controller Area Network) bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101102249A CN102645264A (en) | 2012-04-16 | 2012-04-16 | Weighing sensor based on CAN (Controller Area Network) bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102645264A true CN102645264A (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101102249A Pending CN102645264A (en) | 2012-04-16 | 2012-04-16 | Weighing sensor based on CAN (Controller Area Network) bus |
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| Country | Link |
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| CN (1) | CN102645264A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280165A (en) * | 2014-10-10 | 2015-01-14 | 宁波朗科精工技术有限公司 | Three-axis force sensor |
| CN104299392A (en) * | 2014-11-07 | 2015-01-21 | 智性科技南通有限公司 | Wireless sensing node for monitoring health of building structure |
| CN110445888A (en) * | 2019-09-02 | 2019-11-12 | 山西力创自动化技术有限公司 | A kind of digital weighing sensor address self-setting system and its setting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004037619A1 (en) * | 2002-10-24 | 2004-05-06 | Daimlerchrysler Ag | Method for monitoring a weight-sensing system |
| CN2864627Y (en) * | 2006-01-20 | 2007-01-31 | 梅特勒-托利多(常州)称重设备系统有限公司 | Control circuit for intelligent weighing sensor |
| CN201094083Y (en) * | 2007-07-27 | 2008-07-30 | 中国航天科技集团公司第四研究院第四十四研究所 | Hump weight checking apparatus |
| CN101319929A (en) * | 2008-06-23 | 2008-12-10 | 无锡新普精密科技有限公司 | Weighting transducer used for ultra-thin electronic scale |
| CN201555656U (en) * | 2009-12-01 | 2010-08-18 | 常州珠峰称重设备有限公司 | Dynamic number weighting converter |
| CN201765049U (en) * | 2010-09-03 | 2011-03-16 | 山东博硕电子有限公司 | Multi-Channel Weighing Module |
| TR201102920A2 (en) * | 2011-03-28 | 2011-09-21 | İsbak İstanbul Ulaşim Haberleşme Ve Güvenli̇k Teknoloji̇leri̇ Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | On-board real-time weight estimation system using CAN bus |
| CN202631068U (en) * | 2012-04-17 | 2012-12-26 | 宁波朗科精工技术有限公司 | CAN bus-based weighing sensor |
-
2012
- 2012-04-16 CN CN2012101102249A patent/CN102645264A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004037619A1 (en) * | 2002-10-24 | 2004-05-06 | Daimlerchrysler Ag | Method for monitoring a weight-sensing system |
| CN2864627Y (en) * | 2006-01-20 | 2007-01-31 | 梅特勒-托利多(常州)称重设备系统有限公司 | Control circuit for intelligent weighing sensor |
| CN201094083Y (en) * | 2007-07-27 | 2008-07-30 | 中国航天科技集团公司第四研究院第四十四研究所 | Hump weight checking apparatus |
| CN101319929A (en) * | 2008-06-23 | 2008-12-10 | 无锡新普精密科技有限公司 | Weighting transducer used for ultra-thin electronic scale |
| CN201555656U (en) * | 2009-12-01 | 2010-08-18 | 常州珠峰称重设备有限公司 | Dynamic number weighting converter |
| CN201765049U (en) * | 2010-09-03 | 2011-03-16 | 山东博硕电子有限公司 | Multi-Channel Weighing Module |
| TR201102920A2 (en) * | 2011-03-28 | 2011-09-21 | İsbak İstanbul Ulaşim Haberleşme Ve Güvenli̇k Teknoloji̇leri̇ Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | On-board real-time weight estimation system using CAN bus |
| CN202631068U (en) * | 2012-04-17 | 2012-12-26 | 宁波朗科精工技术有限公司 | CAN bus-based weighing sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280165A (en) * | 2014-10-10 | 2015-01-14 | 宁波朗科精工技术有限公司 | Three-axis force sensor |
| CN104299392A (en) * | 2014-11-07 | 2015-01-21 | 智性科技南通有限公司 | Wireless sensing node for monitoring health of building structure |
| CN110445888A (en) * | 2019-09-02 | 2019-11-12 | 山西力创自动化技术有限公司 | A kind of digital weighing sensor address self-setting system and its setting method |
| CN110445888B (en) * | 2019-09-02 | 2024-02-20 | 山西力创自动化技术有限公司 | Communication address self-setting system and method for digital weighing sensor |
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Application publication date: 20120822 |