CN219971648U - Lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission - Google Patents
Lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission Download PDFInfo
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- CN219971648U CN219971648U CN202320738400.7U CN202320738400U CN219971648U CN 219971648 U CN219971648 U CN 219971648U CN 202320738400 U CN202320738400 U CN 202320738400U CN 219971648 U CN219971648 U CN 219971648U
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Abstract
The utility model discloses a lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission, which comprises a host display module and a slave acquisition module, wherein the host display module is arranged in a control room, the slave acquisition module is arranged beside a lifting mechanism winding drum on a trolley, the slave acquisition module is connected with a resistance strain sensor, and a circuit processing module, a power module, a liquid crystal display circuit and a host singlechip are arranged in the host display module. The lifting capacity acquisition and measurement system for the master-slave distributed CAN bus transmission solves the problems that a 4-core shielded cable moves a cable pulley through a bridge, the cable diameter is thin, the cable is easy to damage, the cable is easy to interfere by a power cable, and measured data is distorted and inaccurate due to the fact that the circuit processing module, a liquid crystal display circuit, a power module, a second isolation CAN module transmission circuit, a host singlechip and an alarm output module are arranged.
Description
Technical Field
The utility model relates to the technical field of overload protection of general bridge cranes and gantry cranes, in particular to a lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission.
Background
After the overload protection device of the lifting machinery of GB12602 and the periodic inspection and test rule of the lifting machinery of TSGQ7015-2016 are issued, the periodic inspection cycle of the bridge crane is regulated once every 2 years, the crane for lifting molten metal is required to be carried out 1 time a year, in the communication with a user and a test department, the unqualified problem found in the definite inspection of the lifting limiter of the crane is the largest, on-site maintenance personnel does not have knowledge in electronic aspect, the problems of abnormal instrument display, abnormal display adjustment, abnormal alarm and the like are difficult to be processed, and a lifting limiter product which can be maintained by maintenance electricians is designed, and the display and control system which is easy to recover, easy to diagnose and has self-test capability is provided, thus the overload protection device is a precondition for protecting the safe operation of the crane.
The lifting mechanism of bridge and portal crane is required to be provided with a lifting limiter protection device, and most of the functions are that a bearing seat type pressure sensor is arranged on a winding drum, a signal amplifying box is arranged beside the crane, and then the lifting limiter protection device passes through a 4-core 1.0mm 2 The shielded cable is connected to the instrument control box of the cab, the instrument control box processes data, outputs alarm or overload action points, and because the 4-core shielded cable moves the cable pulley through the bridge, the cable diameter is smaller, the cable is very easy to damage, and is easy to be interfered by the power cable, the measured data is distorted and inaccurate, and the lifting weight of the existing crane is increasedThe limiter protection device basically loses the protection effect after a period of operation, and mainly causes such as poor connection of a shielded cable, interference, difficulty in adjustment of an instrument control box and the like, while the pressure sensor is generally not damaged. The maintenance personnel on site do not have the technical level in this aspect, can't maintain the long-term steady operation of lifting limiter, every year's hoist periodic inspection, and special inspection personnel can all inspect lifting limiter inefficacy, the unqualified problem of definite inspection.
The utility model with the application number of CN212050219U discloses a weight signal acquisition circuit for a crane, which comprises a signal follower circuit, a filter circuit, an operational amplifier circuit, a full value adjusting circuit and the like which are connected with a crane weight sensor. However, the problems of the utility model are that the problems of the whole structure, the effective and stable transmission of the output signals of the sensor, the repair of faults, the treatment of double mechanisms and the like are not introduced, the effective monitoring of the lifting limiter can not be ensured, and the safe operation of the crane is affected.
The utility model of application number CN204462761U discloses a digital crane lifting limiter based on a CAN bus, which comprises a host module, a special CAN communication bus, a transmission extension module and a weighing sensor, wherein the host module adopts a CPLD central processing unit, the host module is connected with the transmission extension module through the special CAN communication bus, the A, B, C, D weighing sensors are all connected to the transmission extension module, and once the transmission extension module is damaged, the whole system is paralyzed; the single weighing sensor circuit has problems, and the system cannot perform alarm processing.
Therefore, a novel master-slave distributed CAN bus transmission lifting capacity acquisition and measurement system is provided to solve the problems.
Disclosure of Invention
The utility model aims to provide a lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission, which aims to solve the problems that in the background art, as a 4-core shielded cable moves a cable pulley through a bridge, the cable diameter is small, the cable is easy to damage, the cable is easy to interfere with a power cable, and the measured data is distorted and inaccurate.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the lifting capacity acquisition measurement system for master-slave distributed CAN bus transmission comprises a host display module and a slave acquisition module, wherein the host display module is arranged in a control room, the slave acquisition module is arranged beside a lifting mechanism winding drum on a trolley, and the slave acquisition module is connected with a resistance strain sensor;
the inside of host computer display module is provided with circuit processing module, power module, liquid crystal display circuit, host computer singlechip, second isolation CAN module transmission circuit and alarm output module, the inside of slave computer collection module is provided with spacing input module, sensor data collection module, relay output module, first isolation CAN module transmission circuit, slave computer singlechip and sub-power conversion module.
Preferably, the liquid crystal display circuit is a liquid crystal display screen, and the liquid crystal display circuit is directly connected with an I/O port of a pin of the host singlechip for driving.
Preferably, the slave machine acquisition module is an independent unit, the slave machine acquisition module can be increased or decreased according to the number of the lifting mechanisms, and each unit is not affected by each other.
Preferably, the sensor data acquisition module comprises an instrument amplifier formed by an operational amplifier, a second-order low-pass filter circuit, a voltage bias conditioning circuit, an analog-to-digital conversion and MCU microprocessor and the like.
Preferably, the master computer display module and the slave computer acquisition module are connected by adopting a double-core shielding twisted pair, and one section of the double-core shielding twisted pair passes through a double-core 24V power line.
Preferably, the host display module has the functions of a digital setting and adjusting circuit, and comprises a display zeroing function, a compensation setting function, a display setting function, an alarm output module and a sensor setting function.
Compared with the prior art, the utility model has the beneficial effects that: the lifting capacity acquisition and measurement system transmitted by the master-slave distributed CAN bus not only realizes a rapid analysis and judgment function, realizes a connection protection function, but also realizes an alarm function;
(1) Through being provided with circuit processing module, liquid crystal display circuit, power module, second isolation CAN module transmission circuit, host computer singlechip and alarm output module, adopt a host computer display module, the distributed architecture of many slaves machine collection module, one of them host computer display module installs in the control room, accomplish the weight display, overload audible and visual alarm, output function, after receiving the data signal on the bus in the host computer display module, carry out analysis and judgement, carry out quick alarm processing to the weight of exceeding 85% load, carry out the restriction output to the weight of exceeding 105% load, realize the weight limiter function, but the slaves machine collection module access hoisting mechanism's upper and lower limit is spacing in advance in addition.
(2) The secondary computer acquisition module acquires data of the lifting capacity sensor, carries out filtering, biasing and amplifying treatment to obtain digital quantity signals, and transmits the digital quantity signals to the bus through the first isolated CAN module transmission circuit, is connected with the host display module through the double-core shielded twisted pair, and CAN send an action state to a control system of the host display module access mechanism through the CAN bus, so that external hard wiring is saved;
(3) Through being provided with alarm output module, still utilize original sensor operation to the sensor undamaged, use the twin-core shielding paired line between host computer display module, the slave acquisition module, two wherein be used for supplying power, two are used for CAN data transmission, and main, vice only need use transmission line that plays to rise, practice thrift the cost, reduce the fault rate, the host computer display module, the slave adopts the isolation power between the acquisition module CAN bus, arbitrary module falls the station each other and does not influence, the stability of system has been improved, host computer display module has alarm display to falling the station unit, be convenient for inspect, repair, the maintainability of improvement system.
Drawings
FIG. 1 is a schematic cross-sectional elevation view of the present utility model;
FIG. 2 is a schematic diagram of a front view of a host display module according to the present utility model;
FIG. 3 is a schematic diagram showing the front view of the LCD circuit of the present utility model;
fig. 4 is a schematic front view of a sensor data acquisition module according to the present utility model.
In the figure: 1. a host display module; 2. the slave acquisition module; 3. a circuit processing module; 4. a liquid crystal display circuit; 5. a power module; 6. a limit input module; 7. a sensor data acquisition module; 8. a relay output module; 9. a first isolated CAN module transmission circuit; 10. the slave microcomputer is a single-chip microcomputer; 11. a sub power conversion module; 12. a dual-core shielded twisted pair; 13. a dual-core 24V power cord; 14. a second isolated CAN module transmission circuit; 15. a host singlechip; 16. and an alarm output module.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1: referring to fig. 1-4, a lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission comprises a host display module 1 and a slave acquisition module 2, wherein the host display module 1 is arranged in a control room, the slave acquisition module 2 is arranged beside a lifting mechanism winding drum on a trolley, and the slave acquisition module 2 is connected with a resistance strain sensor;
the inside of the host computer display module 1 is provided with a circuit processing module 3, a power supply module 5, a liquid crystal display circuit 4, a host computer singlechip 15, a second isolation CAN module transmission circuit 14 and an alarm output module 16, and the inside of the slave computer acquisition module 2 is provided with a limit input module 6, a sensor data acquisition module 7, a relay output module 8, a first isolation CAN module transmission circuit 9, a slave computer singlechip 10 and a sub-power supply conversion module 11;
the liquid crystal display circuit 4 is a liquid crystal display screen, and the liquid crystal display circuit 4 is directly connected with an I/O port of a pin 15 of the host singlechip for driving;
specifically, as shown in fig. 1 and 3, when in use, a distributed structure of a host display module 1 and a multi-slave acquisition module 2 is adopted, wherein one host display module 1 is installed in a control room to complete the functions of lifting capacity display, overload audible and visual alarm and output, after receiving a data signal on a bus, the host display module 1 performs analysis and judgment, performs rapid alarm processing on the weight exceeding 85% of load, and performs limit output on the weight exceeding 105% of load, thereby realizing the function of a lifting capacity limiter.
Example 2: the slave acquisition module 2 is an independent unit, the slave acquisition module 2 can be increased or decreased according to the number of lifting mechanisms, each unit is not affected by each other, and the sensor data acquisition module 7 comprises an instrument amplifier formed by an operational amplifier, a second-order low-pass filter circuit, a voltage bias conditioning circuit, an analog-to-digital conversion and MCU (micro control unit) microprocessor and the like;
specifically, as shown in fig. 1 and fig. 2, when in use, the slave acquisition module 2 acquires the data of the lifting sensor, performs filtering, biasing and amplifying processing to digital quantity signals, transmits the digital quantity signals to a bus through the first isolated CAN module transmission circuit 9, is connected with the host display module 1 through the double-core shielded twisted pair 12, and CAN send the action state to the control system of the access mechanism of the host display module 1 through the CAN bus, thereby saving external hard wiring.
Example 3: the host display module 1 and the slave acquisition module 2 are connected by adopting a double-core shielding twisted pair 12, one section of the double-core shielding twisted pair 12 passes through a double-core 24V power line 13, the host display module 1 has the functions of a digital setting and adjusting circuit, and the host display module 1 comprises a display zeroing function, a compensation setting function, a display setting function, an alarm output module 16 and a sensor setting function;
specifically, as shown in fig. 1 and fig. 4, the sensor is still operated by the original sensor when not damaged, two double-core shielding twisted pair 12 are used between the host display module 1 and the slave acquisition module 2, two of the double-core shielding twisted pair 12 are used for supplying power, two double-core shielding twisted pair are used for CAN data transmission, and the host and the slave are lifted only by using one transmission line, so that the cost is saved, the failure rate is reduced, the CAN bus between the host display module 1 and the slave acquisition module 2 adopts an isolated power supply, any modules are not affected by each other when the slave acquisition module falls off, the stability of the system is improved, the host display module 1 has alarm display on a falling off unit, the inspection and the repair are facilitated, and the maintainability of the system is improved.
Working principle: when the intelligent elevator system is used, after the slave singlechip 10 connected with the slave acquisition module 2 is subjected to digital conversion, the intelligent elevator system is sent to a CAN bus, the host display module 1 is used for conversion and judgment after receiving the intelligent elevator system, displaying the lifting weight value, early warning information and alarm state output, and CAN be connected with an upper pre-limit switch and a lower pre-limit switch, the intelligent elevator system is transmitted to a control room through the CAN bus, so that hard wire connection is reduced, the failure rate is reduced, the host display module 1 is used for analyzing and judging after receiving a data signal on the bus, carrying out alarm output on the weight exceeding 85 percent of load, and carrying out limit output on the weight exceeding 105 percent of load, so that the lifting weight limiter function is realized, and in addition, the slave acquisition module 2 CAN be connected with the upper pre-limit and lower pre-limit of a lifting mechanism, the action state CAN be sent to the host display module 1 through the CAN bus, and the control system of the access mechanism is saved in external hard wire.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a master-slave distribution type CAN bus transmission's lifting capacity gathers measurement system, includes host computer display module (1) and slave machine collection module (2), its characterized in that: the host display module (1) is arranged in the control room, the slave acquisition module (2) is arranged beside the hoisting mechanism winding drum on the trolley, and the slave acquisition module (2) is connected with the resistance strain sensor;
the intelligent remote control monitoring system is characterized in that a circuit processing module (3), a power supply module (5), a liquid crystal display circuit (4), a host singlechip (15), a second isolation CAN module transmission circuit (14) and an alarm output module (16) are arranged in the host display module (1), and a limit input module (6), a sensor data acquisition module (7), a relay output module (8), a first isolation CAN module transmission circuit (9), a slave singlechip (10) and a sub-power supply conversion module (11) are arranged in the slave acquisition module (2).
2. The master-slave distributed CAN bus transmitted load capacity acquisition measurement system of claim 1, wherein: the liquid crystal display circuit (4) is a liquid crystal display screen, and the liquid crystal display circuit (4) is directly connected with an I/O port of a pin of the host singlechip (15) for driving.
3. The master-slave distributed CAN bus transmitted load capacity acquisition measurement system of claim 1, wherein: the auxiliary machine acquisition modules (2) are independent units, the auxiliary machine acquisition modules (2) can be increased or decreased according to the number of the lifting mechanisms, and each unit is not affected by each other.
4. The master-slave distributed CAN bus transmitted load capacity acquisition measurement system of claim 1, wherein: the sensor data acquisition module (7) comprises an instrument amplifier formed by an operational amplifier, a second-order low-pass filter circuit, a voltage bias conditioning circuit, an analog-to-digital conversion and an MCU microprocessor.
5. The master-slave distributed CAN bus transmitted load capacity acquisition measurement system of claim 1, wherein: the host display module (1) and the slave acquisition module (2) are connected by adopting a double-core shielding twisted pair (12), and one section of the double-core shielding twisted pair (12) passes through a double-core 24V power line (13).
6. The master-slave distributed CAN bus transmitted load capacity acquisition measurement system of claim 1, wherein: the host display module (1) has the functions of a digital setting and adjusting circuit, and the host display module (1) comprises a display zeroing function, a compensation setting function, a display setting function, an alarm output module (16) and a sensor setting function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320738400.7U CN219971648U (en) | 2023-04-06 | 2023-04-06 | Lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320738400.7U CN219971648U (en) | 2023-04-06 | 2023-04-06 | Lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission |
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| Publication Number | Publication Date |
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| CN219971648U true CN219971648U (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320738400.7U Active CN219971648U (en) | 2023-04-06 | 2023-04-06 | Lifting capacity acquisition and measurement system for master-slave distributed CAN bus transmission |
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| CN (1) | CN219971648U (en) |
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- 2023-04-06 CN CN202320738400.7U patent/CN219971648U/en active Active
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