CN205204654U - Torque limiter who adapts to complicated electromagnetic compatibility environment - Google Patents
Torque limiter who adapts to complicated electromagnetic compatibility environment Download PDFInfo
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- CN205204654U CN205204654U CN201520853592.1U CN201520853592U CN205204654U CN 205204654 U CN205204654 U CN 205204654U CN 201520853592 U CN201520853592 U CN 201520853592U CN 205204654 U CN205204654 U CN 205204654U
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Abstract
The utility model provides a torque limiter who adapts to complicated electromagnetic compatibility environment, including sensor unit, main control board, display, the main control board includes power supply chip, IV converting circuit and singlechip, power module is used for for singlechip output direct current steady voltage electric current, sensor unit's signal output part links to each other with IV converting circuit's input, and IV converting circuit's output links to each other with the signal input part of the AD module of singlechip, the singlechip is used for gathering IV converting circuit's output signal, through AD conversion back, carries out data processing and export showing for the display, the main control board still includes connector, IO driver, and the connector is near the IO driver. The utility model discloses a torque limiter passes through the design of a series of anti electromagnetic compatibility of main control board, makes it work under complicated electromagnetic compatibility's environment, effective isolation signal interference, messenger hoisting equipment can normally work under complicated electromagnetic compatibility environment. Can progressively introduce to the market, have good application prospect.
Description
Technical field
The utility model relates to field of engineering technology, is specifically related to a kind of limiter of moment adapting to complicated electromagnetic compatible environment.
Background technology
Along with expanding economy, elevator machinery is to be widely applied to national defence, mine, highway construction, railway construction, smelt, the industries such as chemical industry are used widely, when using hoisting crane to carry out hoisting operation, need often to change operating mode according to field condition and carry out hoisting operation, hang as changed and carry angle etc., and the work luffing lifted by crane under different operating mode and maximum load rating are different, therefore a set of safety device is needed to carry out comprehensive monitoring judgement to above parameter, real-time display hoisting crane normally works, fully loaded, overload, luffing surpasses the upper limit, luffing surpasses the mode of operations such as lower limit, and carry out corresponding warning, prompting, control, to ensure crane safety work.For this reason, hoisting crane is all furnished with limiter of moment as safety guard, according to the mode of operation of hoisting crane reality, according to specific load curve, automatically moment restriction is carried out to hoisting crane, prevent the dangerous play of hoisting crane.Therefore, limiter of moment product is the requisite safety guard of one on lifting equipment.
Along with the development of society, technology is constantly perfect, the raising of awareness of safety, and the domestic limiter of moment to hoisting crane requires also improving constantly.Weight-lifting equipment mode of operation safety detection mainly relies on overload warning fender guard and limiter of moment to complete.When weight-lifting equipment works; overload warning fender guard linear transducer, angular transducer, lifting weight sensor detect hoisting device equipment availability relevant signal information in real time; and send signal to master controller and carry out data processing; when weight-lifting equipment works under the environment of complicated electromagnetic compatibility; the interference of signal can affect the data accuracy of primary controller, lowers the safety and reliability of weight-lifting equipment.
Utility model content
The utility model overcomes the deficiency that prior art exists, and provides a kind of limiter of moment adapting to complicated electromagnetic compatible environment.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of limiter of moment adapting to complicated electromagnetic compatible environment, comprises sensor unit, master control board, telltale; Described master control board comprises power supply chip, I/V change-over circuit and micro controller system; Described power module is used for exporting DC voltage-stabilizing electric current to described micro controller system; The signal output part of described sensor unit is connected with the input end of described I/V change-over circuit, the mouth of described I/V change-over circuit is connected with the A/D module by signal input end of described micro controller system, described micro controller system is for gathering the output signal of described I/V change-over circuit, after being changed by A/D, carry out data processing and export to the display of described telltale; Described master control board also comprises adaptor union, I/O actuator, and described adaptor union is near described I/O actuator; The model of described power supply chip is LTM8032, and the model of described micro controller system is Atmega128.
Described sensor unit comprises linear transducer, angular transducer and lifting weight sensor.
The pcb board ground of described master control board is connected to form EMC ground near interface section by least two fix screws and casing, and each bar I/O line of described adaptor union is connected by decoupling capacitor and described EMC.
The limiter of moment of the complicated electromagnetic compatible environment of described adaptation, also comprise R/C filter circuit, described R/C filter circuit is arranged between described I/V change-over circuit and described micro controller system.
The utility model compared with prior art has following beneficial effect: limiter of moment by a series of anti-EMC Design of master control board, make it can work under the environment of complicated electromagnetic compatibility, effectively isolate signal disturbing, guarantee the reliability and stability of related data transmission and process, guarantee that weight-lifting equipment normally can work under complicated electromagnetic compatible environment.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the limiter of moment of embodiment of the present utility model.
Detailed description of the invention
Be described further below in conjunction with accompanying drawing 1 pair of the utility model.Be the structured flowchart of the limiter of moment of the utility model embodiment as Fig. 1, comprise sensor unit, master control board, telltale, master control board comprises power supply chip, I/V change-over circuit and micro controller system, the power output end of power module is connected with micro controller system, for exporting DC voltage-stabilizing electric current to micro controller system, the signal output part of sensor unit is connected with the input end of I/V change-over circuit (current/voltage converter circuit), the mouth of I/V change-over circuit is changed with the A/D of micro controller system (AC/DC is changed), and module by signal input end is connected, the output signal of sensor unit is all 4 ~ 20mA current signal of standard, so namely be can be exchanged into 0 ~ 2.5V voltage signal of applicable micro controller system process by I/V change-over circuit, the A/D module finally voltage signal being sent into micro controller system is changed, convert analog quantity to corresponding digital quantity, data processing unit in micro controller system carries out calculating to this digital signal again and processes, the result calculated and process outputs to telltale and shows.
What the master control board of the limiter of moment of the utility model embodiment adopted is model is the micro controller system of Atmega128, this micro controller system inside is integrated with the A/D modular converter of 8 path 10 positions, in the limiter of moment of the present embodiment, sensor unit comprises linear transducer, angular transducer and lifting weight sensor.Each sensor signal is by after I/V change-over circuit, send into IN1, IN2 and IN3 port of I/V change-over circuit respectively, after 0 ~ 2.5V voltage signal that I/V change-over circuit converts applicable Atmega128 micro controller system to, send into AIN0.0, AIN0.1 and AIN0.2 of the A/D modular converter of the micro controller system of Atmega128 again, convert analog quantity to corresponding digital quantity, then carry out data processing.Described micro controller system is for gathering the output signal of described I/V change-over circuit; after being changed by A/D; carry out data processing and export to the display of described telltale; when there is overload warning in weight-lifting equipment; the main control board device of limiter of moment can send alarm message, guarantees that overload protection devices of hoisting device can reliablely and stablely run.
As shown in Figure 1, the master control board of the limiter of moment of the utility model embodiment also comprises R/C filter circuit, described R/C filter circuit is arranged between described I/V change-over circuit and described micro controller system, the voltage signal converted to through I/V change-over circuit is after R/C filter circuit, send into AIN0.0, AIN0.1 and AIN0.2 of the A/D modular converter of the micro controller system of Atmega128 again, thus the electromagnetic noise of circuit can be reduced.
The power module of the limiter of moment of the utility model embodiment adopts model to be LTM8032DC/DC power supply chip, be a electromagnetic compatibility (EMC) 36V, 2ADC/DC buck converter, aim at the radiation-emitting meeting EN55022 standard and require and design.Built-in on off controller, source switch, inducer, filter and all supporting elements in encapsulation.This power module can operate in the input voltage range of 3.6V to 36V, supports the output voltage range of 0.8V to 10V and the switching frequency range (setting by single resistor) of 200kHz to 2.4MHz.Adopt high-capacity input and output filter capacitor just can realize complete design.Owing to have employed flat encapsulation, the vacant space bottom pcb board is utilized to regulate to realize high density load point.Mold pressing resin land grid array (LGA) encapsulation that LTM8032 adopts resistance to heat enhancement mode compact and flat and ball grid array (BGA) encapsulation, be applicable to adopting standard surface mount equipment to carry out Automated assembly, meet RoHS standard.
In order to reduce the parameter of distribution between the high frequency components and parts on master control board and electromagnetic interference each other, in the limiter of moment of the present embodiment, during master control board design, shorten the line between high frequency components and parts as far as possible; Between may have components and parts or the wire of higher voltage, strengthen the distance between them, in order to avoid accidental short circuit is drawn in electric discharge; I/O(I/O) actuator near adaptor union, after I/O signal is entered from adaptor union, I/O actuator can be entered at once, and longer distance can not be walked on pcb board, in order to avoid the upper interfering signal of coupling.And there is no the high-speed figure chip of handshaking with adaptor union, be placed on away from adaptor union place, thus avoid high-speed digital signal by electric field, magnetic Field Coupling, produce interference, and outwards launched by cable; The device that cal val is large should be radiating gill slot milling, even should be contained on the negative of complete machine, is beneficial to heat radiation.Thermal element should away from heat element.For master control board, what cal val was maximum has been exactly power supply chip, the LTM8032DC/DC power supply chip that the utility model adopts, not only heat radiation better, and electromagnetic compatibility meets the chip of EN55022 standard, adopt LGA encapsulation, taken into account heat radiation and electromagnetic compatibility; Do not have obvious flow process between the master control board functions of the present embodiment, be more parallel between them, so when fabric swatch, carries out layout according to functions; Centered by the core parts of each functional module, carry out layout around it, reduce as far as possible and shorten the lead-in wire between each components and parts and connecting length; Consider the parameter of distribution between each element.Make components and parts arrangement in parallel as far as possible, be so not only conducive to strengthening antijamming capability, and appearance looks elegant, be easy to batch manufacturing.
In the master control board of the limiter of moment of the utility model embodiment, the width of overstriking power and ground makes their cabling all reach 20mil, decreases loop resistance, simultaneously, make the trend of power lead ground wire consistent with data direction of transfer, contribute to strengthening noise resisting ability.For reducing the right characteristic impedance of power supply wire, power lead and ground wire should be thick as much as possible, and power lead and ground wire, at the overlapping cabling in plate both sides, form couple of conductor pair, make power supply loop area be reduced to minimum level.Power supply and the ground pin of same chip, be connected to same wire pair; In order to reduce earth loop interference, the formation of cancellation loop electric current, adopts isolating transformer, light-coupled isolation etc. to cut off the formation of ground loop current in circuit; In addition, the pcb board ground of master control board is connected to form EMC ground near interface section by least two fix screws and casing, also referred to as casing ground, with can ensureing EMC with casing same potential, at least two multiple spot overlapping modes connected can make bond impedance little as far as possible; Be connected with digitally keeping single-point EMC.Every bar I/O line difference decoupling capacitor in parallel at adaptor union place, to EMC ground, makes the inductance of decoupling circuit the smaller the better.If external disturbance is invaded by interface, then just switched on casing by decoupling capacitor in region, EMC ground, thus protected the work of internal circuit normal safe.
In the limiter of moment of the utility model embodiment, the wires design of master control board adopts following scheme, in multilayer board wires design, have employed " well " font net structure between adjacent layer; Cablings all in circuit card is all 45 degree or 135 degree of angles, decreases wire bending, avoids conductor width to suddenly change, prevent characteristic impedance from changing; Outermost layer wire or components and parts are not less than 2mm from printed board Edge Distance, can prevent characteristic impedance from changing, also help PCB clamping; For needing the device laying large area Copper Foil as power supply chip, with lattice-shaped, and to be connected with stratum by via hole and to design.
Limiter of moment of the present utility model by a series of anti-EMC Design of master control board, make it can work under the environment of complicated electromagnetic compatibility, effectively isolate signal disturbing, guarantee the reliability and stability of related data transmission and process, guarantee that weight-lifting equipment normally can work under complicated electromagnetic compatible environment.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from the utility model aim.
Claims (4)
1. adapt to a limiter of moment for complicated electromagnetic compatible environment, it is characterized in that, comprise sensor unit, master control board, telltale; Described master control board comprises power supply chip, I/V change-over circuit and micro controller system;
Described power module is used for exporting DC voltage-stabilizing electric current to described micro controller system;
The signal output part of described sensor unit is connected with the input end of described I/V change-over circuit, the mouth of described I/V change-over circuit is connected with the signal input part of the A/D module of described micro controller system, described micro controller system is for gathering the output signal of described I/V change-over circuit, after being changed by A/D, carry out data processing and export to the display of described telltale;
Described master control board also comprises adaptor union, I/O actuator, and described adaptor union is near described I/O actuator;
The model of described power supply chip is LTM8032, and the model of described micro controller system is Atmega128.
2. the limiter of moment of the complicated electromagnetic compatible environment of adaptation according to claim 1, is characterized in that, described sensor unit comprises linear transducer, angular transducer and lifting weight sensor.
3. the limiter of moment of the complicated electromagnetic compatible environment of adaptation according to claim 1, it is characterized in that, the pcb board ground of described master control board is connected to form EMC ground near interface section by least two fix screws and casing, and each bar I/O line of described adaptor union is connected by decoupling capacitor and described EMC.
4. the limiter of moment of the complicated electromagnetic compatible environment of adaptation according to claim 1, is characterized in that, also comprises R/C filter circuit, and described R/C filter circuit is arranged between described I/V change-over circuit and described micro controller system.
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| CN201520853592.1U CN205204654U (en) | 2015-10-31 | 2015-10-31 | Torque limiter who adapts to complicated electromagnetic compatibility environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105253781A (en) * | 2015-10-31 | 2016-01-20 | 长治清华机械厂 | Moment limiter suitable for complex electromagnetic compatibility environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105253781A (en) * | 2015-10-31 | 2016-01-20 | 长治清华机械厂 | Moment limiter suitable for complex electromagnetic compatibility environment |
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Address after: 046012 mailbox, Changzhi, Shanxi, 6 Co-patentee after: China Academy of Launch Vehicle Technology Patentee after: Shanxi spaceflight Qinghua Equipment Co., Ltd. Address before: 046012 mailbox, Changzhi, Shanxi, 6 Co-patentee before: China Academy of Launch Vehicle Technology Patentee before: Qinghua Machinery Plant, Changzhi |