CN204462761U - Based on the digitizing crane load limiter of CAN - Google Patents
Based on the digitizing crane load limiter of CAN Download PDFInfo
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- CN204462761U CN204462761U CN201520192960.2U CN201520192960U CN204462761U CN 204462761 U CN204462761 U CN 204462761U CN 201520192960 U CN201520192960 U CN 201520192960U CN 204462761 U CN204462761 U CN 204462761U
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Abstract
Based on the digitizing crane load limiter of CAN, comprise host module, special CAN communication bus, transmit extension set module and LOAD CELLS, described host module is connected with display module, relay output module; CPLD CPU (central processing unit), display unit, communication processing circuit, input detecting circuit, power control circuit and key input unit is provided with in described host module; Described host module is by special CAN communication bus and transmission extension set model calling; Described transmission extension set module comprises CPLD CPU (central processing unit) I, display unit I, communication processing circuit I, signal imitation process and A/D convertor circuit, auxiliary output circuit, power control circuit; Described transmission extension set module is connected with Weighing cell module; Also the reliability of load lifting limiter was made greatly to improve while should substantially increasing precision based on the digitizing crane load limiter of CAN, maximum support equipment safe and reliable operation.
Description
Technical field
The utility model relates to crane field of electrical control, especially a kind of digitizing crane load limiter based on CAN.
Background technology
In current crane electric control system, load lifting limiter many employings analog circuitry processes, specific as follows, the lifting capacity sensor output signal be positioned on hoisting mechanism for trolley reel is the weak voltage signal of 0-15mv, drive as DC12V voltage signal, the mode generally used at present is, with four-core shielded cable, weak for this 0-15mv voltage signal is directly sent to crane cabin, transmission range tens meters is not to rice up to a hundred etc., want and main lifting motor simultaneously, secondary lifting motor, the parallel cabling of power line of the motors such as vehicle motor, thus cause interference very large, the signal that in cab, instrument main frame receives is the weak voltage signal be heavily polluted, due to the singularity of simulating signal, this interference cannot be removed, have impact on the accuracy of measurement result significantly, simultaneously in this system, each LOAD CELLS just needs a shielding line to come signal transmission and driving voltage, line is various, also be the reason that failure rate is higher, in sum, transmitting the existence of simulation load lifting limiter system measures inaccurate, the problems such as failure rate is high, have impact on the safe and reliable operation of equipment to a certain extent.Along with the development of digital circuit, need a kind of more reliable product newly badly and occurred, solved the problem.
Utility model content
The utility model aim to provide a kind of substantially increase precision while also make the reliability of load lifting limiter greatly improve, the digitizing crane load limiter based on CAN of maximum support equipment safe and reliable operation.
For achieving the above object, the utility model provides following technical scheme: based on the digitizing crane load limiter of CAN, comprise host module, special CAN communication bus, transmit extension set module and LOAD CELLS, described host module is connected with display module, relay output module, and host module, display module and relay output module are all located in cab; CPLD CPU (central processing unit), display unit, communication processing circuit, input detecting circuit, power control circuit and key input unit is provided with in described host module; Described host module is by special CAN communication bus and transmission extension set model calling; Described transmission extension set module comprises CPLD CPU (central processing unit) I, display unit I, communication processing circuit I, signal imitation process and A/D convertor circuit, auxiliary output circuit, power control circuit; Described transmission extension set module is connected with Weighing cell module, and this Weighing cell module comprises Weighing cell module A, Weighing cell module B, Weighing cell module C and Weighing cell module D.
As further scheme of the present utility model: described display unit is 128*64 lattice display liquid crystal display, is directly connected by bus with CPLD CPU (central processing unit).
As further scheme of the present utility model: described special CAN communication bus is four-core shielded twisted pair.
As further scheme of the present utility model: described Weighing cell module A, Weighing cell module B, Weighing cell module C, Weighing cell module D connect.
As further scheme of the present utility model: described transmission extension set module and LOAD CELLS are installed on trolley platform.
Compared with prior art, the beneficial effects of the utility model are: should adopt CAN communication mode based on the digitizing crane load limiter of CAN, realize collecting sensor signal, signal digital process, signal anti-interference process, Signal transmissions, signal is adjusted, lifting capacity transforms, and lifting capacity shows, and the several functions such as lifting capacity early warning and alarming are in one.And in conjunction with the digital information processing system of brand-new design, realize accurate measurement and the pre-alarm process of crane load.System is by host module, communication bus, transmit extension set, each mechanism sensor composition, main frame is by single-chip microcomputer and peripheral imput output circuit, LCD MODULE forms, single-chip microcomputer obtains relative set information from key-press input, and read each sensor from communication bus, and state is shown in liquid crystal display, judge whether overload according to configuration information and a point machine data thus carry out early warning simultaneously, the actions such as warning, transmitting extension set take single-chip microcomputer as core, data are sent to main frame by isolated can bus, the weak voltage signal of sensor enters AD system after filter and amplification, extension set single-chip microcomputer is entered after digitizing, carry out digital filtering and coding, then bus is sent to.Native system achieves crane all lifting capacity sensors centralized control, malfunction intelligent display, and sensor signal is digitized processing nearby, also makes the reliability of load lifting limiter greatly improve while substantially increasing precision.Reduce maintenance and repair expense and time, maximum support equipment safe and reliable operation.
Accompanying drawing explanation
Fig. 1 is line module figure of the present utility model;
Fig. 2 is work chamber schematic internal view;
Fig. 3 is power interface case overall schematic.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-3, in the utility model embodiment, based on the digitizing crane load limiter of CAN, comprise host module, special CAN communication bus, transmit extension set module and LOAD CELLS, described host module and display module, relay output module connects, host module, display module and relay output module are all located in cab, CPLD CPU (central processing unit) is provided with in described host module, display unit, communication processing circuit, input detecting circuit, power control circuit and key input unit, display unit is 128*64 lattice display liquid crystal display, adopt special Micro Controller Unit (MCU) driving, directly be connected by bus with CPLD CPU (central processing unit), completion status, malfunction coefficient, realize human-computer exchange, described communication processing circuit mainly completes and communicates with extension set, for two-wire system CAN, there is bus-powered circuit inside, input detecting circuit completes the control inputs of button, carry out filtering anti-interference process, complete level conversion and send into core processing unit, complete mainly through voltage comparator, resistance capacity filter, power control circuit is responsible for each module, extension set is powered, when system enters holding state without automatic cut-off power during operation in 60 minutes, described host module is by special CAN communication bus and transmission extension set model calling, this special CAN communication bus is according to the special equipment environment for use of crane, be in dolly towing cable with this cable, frequent bending drags, customize the four-core shielded twisted pair with two steel wire, maximum support equipment reliability of operation and pole less trouble, described transmission extension set module comprises CPLD CPU (central processing unit) I, display unit I, communication processing circuit I, signal imitation process and A/D convertor circuit, auxiliary output circuit, power control circuit, CPLD CPU (central processing unit) I completes the analog-and digital-ization process of sensor signal, then signal after treatment carries out CAN protocol processes and is sent to bus, waits for reception and the process of host module, described transmission extension set module is connected with Weighing cell module, this Weighing cell module comprises Weighing cell module A, Weighing cell module B, Weighing cell module C and Weighing cell module D, and Weighing cell module A, Weighing cell module B, Weighing cell module C, Weighing cell module D connect, described Weighing cell module adopts Wheatstone bridge principle to detect Metal Deformation, thus the pressure born that converts, then through wiring number of times, roll fashion etc. calculate the lifting capacity obtained on crampon, described transmission extension set module and LOAD CELLS are installed on trolley platform.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (5)
1. based on the digitizing crane load limiter of CAN, comprise host module, special CAN communication bus, transmit extension set module and LOAD CELLS, it is characterized in that, described host module is connected with display module, relay output module, and host module, display module and relay output module are all located in cab; CPLD CPU (central processing unit), display unit, communication processing circuit, input detecting circuit, power control circuit and key input unit is provided with in described host module; Described host module is by special CAN communication bus and transmission extension set model calling; Described transmission extension set module comprises CPLD CPU (central processing unit) I, display unit I, communication processing circuit I, signal imitation process and A/D convertor circuit, auxiliary output circuit, power control circuit; Described transmission extension set module is connected with Weighing cell module, and this Weighing cell module comprises Weighing cell module A, Weighing cell module B, Weighing cell module C and Weighing cell module D.
2. the digitizing crane load limiter based on CAN according to claim 1, it is characterized in that, described display unit is 128*64 lattice display liquid crystal display, is directly connected by bus with CPLD CPU (central processing unit).
3. the digitizing crane load limiter based on CAN according to claim 1, is characterized in that, described special CAN communication bus is four-core shielded twisted pair.
4. the digitizing crane load limiter based on CAN according to claim 1, it is characterized in that, described Weighing cell module A, Weighing cell module B, Weighing cell module C, Weighing cell module D connect.
5. the digitizing crane load limiter based on CAN according to claim 1, it is characterized in that, described transmission extension set module and LOAD CELLS are installed on trolley platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520192960.2U CN204462761U (en) | 2015-04-02 | 2015-04-02 | Based on the digitizing crane load limiter of CAN |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520192960.2U CN204462761U (en) | 2015-04-02 | 2015-04-02 | Based on the digitizing crane load limiter of CAN |
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| Publication Number | Publication Date |
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| CN204462761U true CN204462761U (en) | 2015-07-08 |
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| CN201520192960.2U Expired - Fee Related CN204462761U (en) | 2015-04-02 | 2015-04-02 | Based on the digitizing crane load limiter of CAN |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114625042A (en) * | 2022-02-25 | 2022-06-14 | 南平市建阳区波特安电子科技有限公司 | Direct control system of bridge crane |
-
2015
- 2015-04-02 CN CN201520192960.2U patent/CN204462761U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114625042A (en) * | 2022-02-25 | 2022-06-14 | 南平市建阳区波特安电子科技有限公司 | Direct control system of bridge crane |
| CN114625042B (en) * | 2022-02-25 | 2023-12-26 | 南平市建阳区波特安电子科技有限公司 | Bridge crane direct control system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20180402 |
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| CF01 | Termination of patent right due to non-payment of annual fee |