CN1028740C - Method for controlling conveying and collecting of packing material and controller circuit thereof - Google Patents
Method for controlling conveying and collecting of packing material and controller circuit thereof Download PDFInfo
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- CN1028740C CN1028740C CN 91112654 CN91112654A CN1028740C CN 1028740 C CN1028740 C CN 1028740C CN 91112654 CN91112654 CN 91112654 CN 91112654 A CN91112654 A CN 91112654A CN 1028740 C CN1028740 C CN 1028740C
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Abstract
The invention discloses a collection control method in the conveying of packing materials and a designed digital collection controller circuit thereof. The system has the advantages that the system can collect the carried objects on a plurality of branch conveying belts onto one main conveying belt according to specified intervals or distances, has the functions of carrying object length setting, object unloading position adjustment, actuating mechanism action delay setting, collection simulation display, total amount counting display, sensor fault backup and diagnosis self-test, is simple and practical in system composition, is particularly suitable for large packages, and realizes the full-line automatic shipment from a packing machine to vehicles and ships. And configuring corresponding speed measuring sensors and input and output sensing actuating mechanisms according to different production processes. The method can be applied to automatic production lines of other industries.
Description
The invention discloses compiling control method and compiling controller circuitry in a kind of packing material belt transportation with the digital packing material transmission of this method design-calculated.
The present invention is applicable in the belt transportation to large packing material, and interval or the distance of the loads on many belt conveyor according to the production technology regulation is pooled on the main belt.
Currently used method has regularly synchronizing pulse method and statistical approach control.The former requires each bar to prop up load position on the belt conveyor, spacing must be consistent, make respectively to unload the thing actuating unit and advance thing simultaneously, and production technology is difficult to realize, and unloads object location and depend on the installation site of unloading the thing actuating unit.These all cause the delivery space of main belt to be not fully utilized.The latter can only control adjacent two and unload the interval that is not less than a regulation between thing, and is wasted less than the main belt delivery space of loading segment length at interval greater than this, and system forms complexity, debugging is loaded down with trivial details, obstacle overcome ability is poor.Both common defects are to be offset uncompensated adjustment measure to unloading the caused object location that unloads of thing actuating unit variation delay time, so it is of poor quality to compile control, unload overlapped between thing, collision, get rid of, stop up and to happen occasionally, cause system's conveying efficiency low, and the both do not have commonality, applies inconvenience.
The purpose of this invention is to provide a kind of simple and direct logic control method and transmit and compile controller circuitry, can overcome above-mentioned defective of the prior art by actv. according to the digital packing material of the method design-calculated.
The object of the present invention is achieved like this:
Each bar props up the terminal point of belt conveyor, be equipped with receive load unload the thing actuating unit, its interior switch closure is as sampled signal after advancing thing, respectively unload the thing actuating unit and be arranged in the top of main belt, load space on this section main belt is divided into several loading sections, the loading segment length equals the load width and adds spacing between the load, come the loading situation of these loading sections of trace simulation with the shift register of corresponding figure place, the loading section of respectively unloading thing actuating unit below is a supervision section separately, the corresponding positions of shift register is a monitor bits separately, a tachogenerator is installed on main belt, it is surveyed long calibration and selects according to technological requirement, the main belt distance of surveying long calibration of whenever advancing, sensor just produces a pulse, this pulse is counted by one some presettable counter, its preset count value equals the loading segment length divided by the long calibration of the survey of sensor, presettable counter return zero pulse simultaneously also as the shift pulse of shift register, choose respectively predetermined counter each take turns a certain time sequential pulse and the monitor bits empty signal in the counting and unload the thing actuating unit advanced thing signal three with, each unloads the condition that the thing actuating unit unloads thing as in good time startup, and load interval or the distance according to the rules that each bar is propped up on the belt conveyor is pooled on the main belt.Transmit according to the digital packing material of above method design-calculated CMOS integrated circuit and to compile controller and realized that the repertoire of this method makes and compile control system and form simple and practical.Having the loading segment length sets; Monitor bits is adjusted; Unload the object location adjustment; The actuating unit duration is set; Compiling the operation simulation shows; Compiling thing total amount counting shows; Sensor fault reserve; Trouble diagnosing function such as test oneself, antijamming capability is strong, environmental conditions is required low, and it is easy to utilize to have commonality.
Fig. 1 is the scheme drawing that a packing material transmits aggregating apparatus, and Fig. 2 is that the digital packing material transmission with the CMOS IC design compiles the controller circuitry schematic diagram.
Below with reference to accompanying drawing, by an example packing material of the present invention is transmitted and to compile control method and digital packing material thereof and transmit and compile controller circuitry and be explained in detail.
Fig. 1 is the aggregating apparatus scheme drawing that per hour transmits 7200 packing materials, and one produces the factory of 13,000,000 packing material per year, from wrapping machine to vehicle or the key link of all fronts automatic handling of ship.Packaging type is the bagged granules material, the wide 50cm of bag, and heavy 40kg, belt conveyor is a belt transporter.Six belt conveyor are arranged among Fig. 1, and L0 is a main belt, and service direction is shown in arrow among the figure.G1, G2, G3, G4, G5, G6 be six and unload the thing actuating unit, it be one over against passing the band direction and the top all be uncovered casing, the bottom be two fans by the controllable switch of air cylinder driven.Be installed in the main belt top, receive six packing materials on the belt conveyor respectively, packing material enters the back and connects its interior switch as the sampled signal of compiling controller.Compile controller with electric signal and promote the open and close of bottom door by electromagnetic valve and cylinder.Require the control system must be according to load position situation on the main belt, the in good time unlatching that thing actuating unit bottom door is respectively unloaded in control, make unload the packing material space of dropping on the main belt must not be less than 10cm.Belt transporter, thing actuating unit and installation site thereof the relation of unloading are known technology, have applied to above-mentioned prior art, do not belong to interest field of the present invention.
This method is referred to as a loading section with above-mentioned packing material width and space sum (60cm).The delivery space of unloading this section main belt of thing actuating unit below can be divided into 13 loading sections.Shown in the dividing line a of loading segment length 60cm among Fig. 1.The installation site and the loading section of respectively unloading the thing actuating unit have a kind of corresponding relation just, and promptly just in time align with their cooresponding loading section mid points separately in each center of unloading the thing actuating unit.So just can simulate the loading situation of these loading sections with the shift register of corresponding figure place, the thing set is arranged, each loading section of unloading thing actuating unit below of empty reset is a supervision section separately, and the corresponding positions of shift register is the monitor bits for unloading the thing actuating unit then.The monitor bits of G1 to G6 is respectively D1, D3, D6, D8, D11, D13.A tachogenerator is installed on main belt again, and it surveys long calibration is 1cm, i.e. main belt pulse of 1cm generation of whenever advancing.This pulse is counted by a presettable counter, and preset value is 60.This counting machine return zero pulse also as the shift pulse of shift register, direction of displacement should be consistent with the main belt service direction, in this example for moving to right.So just, realized the trace simulation of main belt loading position.Have only when certain unloads the thing actuating unit and advanced thing, and cooresponding monitor bits is when be " 0 " that enabling nulse could be opened bottom door and unload thing, cooresponding monitor bits set of while.This shows, be the distance of an integer loading section between the mid point of any two loads on the main belt, so just for the thing actuating unit that unloads in main belt downstream has stayed the appropriate object space that unloads, the delivery space of main belt is fully used.How is each enabling nulse that unloads the thing actuating unit chosen? every 60 pulses taking turns counting of predetermined counter are called 1 to 60 according to sequential feels the pulse and dashes.In this example because of unloading the corresponding relation of thing actuating unit installation site and the loading section of drawing, be that each unloads the next loading section of thing actuating unit mid point to arrive the distance at its center all identical, the same pulse of choosing any sequence number is unloaded the enabling nulse of thing actuating unit as all can.Another problem that must solve is to unload the thing actuating unit different delay time of length difference and variation thereof is all arranged, and this can cause the front and back skew of unloading object location.The method that solves is sequence number pulse in the middle of adopting, and feels the pulse to dash as 30 and puts into operation as each enabling nulse that unloads the thing actuating unit.The object location that unloads with G6 is reference, must be because of the thing that unloads of G6 by way of the below of other actuating unit, and facilitate by their the spacing that thing and G6 unload thing of unloading and judge separately correction direction and correction.Then need the enabling nulse that unloads the thing actuating unit of (preceding) correction backward with increasing (subtracting) suitable pulse sequence number as unloading object location respectively, just can obtain correct correction.Corresponding relation because of pulse sequence and main belt operation makes that this adjustment is simple and direct, effectively, conveniently, intuitively.The enabling nulse that will be provided with before this method will put into operation is called inceptive impulse, revises adjusted pulse and is called in good time pulse.
Above elaboration is at unloading the lucky cooresponding situation of thing actuating unit installation site and loading segment length.Wherein both one of the change, all can lose this corresponding relation.Will respectively unload the inceptive impulse that opens the door of thing actuating unit, and how to choose again this moment? known from above analysis, unloading back (preceding) that delay time elongated (weak point) of thing actuating unit can cause unloading object location moves, this did not become with the delay time of unloading the thing actuating unit, and behind its installation site (preceding) to move be equivalent.Different is, the former could judge that to unloading the influence of object location, only being in operation it revises direction and correction, and the latter can obtain by measurement before operation.That is to say its inceptive impulse sequence number of opening the door of the corresponding respectively increase and decrease of each actuating unit, just can make that this corresponding relation is not caused unloads the thing skew and obtain correct compensation correction in advance by installation site and loading segment length.System is put into operation smoothly, and the correction of thing out-of-position was unloaded still with above-mentioned the same to what caused delay time in the operation back.On the other hand unload thing actuating unit installation site or the loading segment length is altered to a certain degree, the monitor bits of respectively unloading the thing actuating unit also will change thereupon.Asking for an interview Fig. 1 loading segment length is 84cm dividing line b.To arrive the distance at its center all be inequality to the next loading section of each actuating unit of this dividing line of sway center-point in any case.Suppose to move on to position as shown in the figure, the pairing pulse of distance of actuating unit center and next loading section mid point is its inceptive impulse that opens the door so.G1 to G6 is respectively: 42; 6; 78; 42; 30; 78.Cooresponding loading section is for monitoring section, and the corresponding position of shift register is a monitor bits.G1 to G6 is respectively: D1; D2; D5; D6; D8; D10, note: the monitor bits of G3 and G6 is not D4 and D9.Obviously, the inceptive impulse of G1, G4, G5 is moderate, all has cooresponding increase and decrease setting range.And the number of the increasing setting range of the minus sign adjustment of G2 and G3, G6 is minimum.G2 is discussed, if operation result need be to the distance of unloading object location reach 7cm of G2 earlier.Its enabling nulse will be done to subtract 7 and adjust, but this has exceeded the adjustable range of G2.At this moment this because of delay time elongated caused unloading move the installation site of regarding G2 as the 7cm that moved to left behind the object location, the mid point that makes its center and loading section D3 is at a distance of 83cm.The monitor bits that needs only G2 changes D3 into by D2 like this, and the inceptive impulse that opens the door changes into No. 83, just makes it unload object location and obtains suitable correction, thereby obtained bigger decrement scope.In like manner, the method that solves when the increment adjustment of G3 and G6 is exceeded adjustable range too, just monitor bits moves to right one.Note! Only when having exceeded adjustable range, just adopt the auxiliary method of adjustment of mobile monitoring position to be only correct.Can set arbitrarily the length of loading section from the visible this method of above narration, the distance between the installation site of each actuating unit is not subjected to any restriction yet.This shows that this method has commonality, will transmit to compile in the controller circuitry at packing material as for the adjustment that how to realize monitor bits and elaborate.Obviously the above-mentioned corresponding relation that keeps actuating unit mounting distance and setting loading segment length is with adjustment easy to use.
The above-mentioned embodiment of compiling control method has multiple, can work out simple and direct program and be used for microprocessor control system, also can be assembled into controller with digital logic circuit.
Fig. 2 is that digital packing material transmits the schematic circuit diagram that compile controller.After the start energising, 14 bit shift register of being made up of IC3 to IC9 are because of the effect automatic zero set of R1, C1, circuit.The impulse singla of sending here by tachogenerator, through IC1, after the 1 Schmidt circuit shaping, deliver to by IC10, two decimal scale predetermined counters that IC11 decimal scale count splitter is formed, its count value is by toggle switch K7, K8 gives installing and decides, ten bit lines along with two decimal scale count splitters of counting, high potential appears on the individual bit line successively, be connected on ten bit lines, toggle switch K9 to K20 on the individual bit line chooses the high potential of corresponding sequence number pulse respectively, deliver to separately four inputs and first of door IC12 to IC14, second input end, if certain unloads the thing actuating unit and has advanced thing, K switch 1 to the K6 respective closed in it is installed then this moment.This signal produces a pulse through photoelectric isolating circuit GL1 to GL6 by differential circuit, makes cooresponding rest-set flip-flop IC15 to IC17 set, and the high potential of its Q end is delivered to the 3rd input end of four inputs separately and door.If cooresponding monitor bits is " 0 ", the high potential of its Q end is sent to the four-input terminal of four inputs and door through cooresponding plug CT1 to CT6 by corresponding CZ1 to CZ13 socket.Cooresponding like this four-input terminal and door conducting.Export a positive pulse and deliver to the S end of monitor bits, make its set through above-mentioned plug, socket.Simultaneously the positive pulse with door output also starts corresponding monostable circuit IC18 to IC20 and power amplifier level thereof, makes the corresponding adhesive of output relay J1 to J6, makes the cooresponding thing actuating unit that unloads open the door and unload thing.Regulate W1 to W6 and make and unload the thing actuating unit the suitable time length that opens the door is arranged, the high potential of monostable circuit mouth is sent to the R end of the rest-set flip-flop of input circuit separately simultaneously, makes its reset.Wait for the arrival of advancing the thing signal once more.When two every meters of decimal scale count splitter are expired the setting value of K7, K8, IC2,1 two inputs make its time zero enter next round with a door conducting and count, and also deliver to the CP end of shift register simultaneously with the output of door, make it move to right one.Compile the thing total amount for accumulative total, increased the rightmost position IC3.1 of shift register, when load passed through continuously, its Q end was continuously high potential and can't counts.But remove to open two inputs and door IC2.2 with its Q end, allow two decimal scale count splitters are every takes turns ten bit lines that a high potential only appears in counting and (be advisable with ten Y1, and loading section setting value must not be less than 10) pulse, send into five decade counters countings that IC21 to IC30 and charactron are formed.The service adjustment method of this controller no longer repeats as top description to inventive method.Introduce other circuit and the effect thereof of this controller below.
The simulating display screen circuit of forming by IC31 to IC34 and light-emitting diode, respectively with Q corresponding linking to each other of end of the rest-set flip-flop of everybody Q end of shift register and input circuit, the correspondence arrangement.Can simulation show the thing that advances that compiles control, unload the dynamic process of thing, transmission.The adapter that utilizes CZ1 to CZ13 and CT1 to CT6 to form makes this controller have the auxiliary adjustment function of commonality and supervision displacement.The differential circuit in the input circuit and the memory function of rest-set flip-flop, make this controller that input switch suitably is installed in many belt transportations that need not to compile as long as on each belt conveyor, can totally transport sum, should disconnect K24 and cut off the output loop power supply this moment.When the sensor et out of order, change-over switch K21 opens by IC1, and 2 and this machine impulse source of forming of resistance capacitance, make controller keep normal operation.Utilize maintenance cable to replace K2, J2 to replace K3 J1, and the like, at last J6 is replaced K1, like this 6 output input circuit head and the tail are conspired to create a closed circuit mutually.This machine of unlatching pulse signal source, as long as the arbitrary once input circuit of short circuit, the circulation always that controller can go round and begin again this signal is gone down, simulating display screen shows this transmittance process with counting read-out counting.Through the input end and clear terminal input end with clear terminal corresponding link to each other with two decimal scale count splitters of K22 switch with the total amount count display, simultaneously in this machine impulse source loop, seal in R2, make about its cycle stretch-out to 1 second, can show that like this simulation shows clearly to be observed loading section setting value, respectively unload thing actuating unit enabling nulse sequence number setting value and whether show consistent with counting by counting.This machine is tested oneself and the purpose of trouble diagnosing to reach.
Because the existing aforementioned disadvantages of compiling technology causes main belt delivery space to be not fully utilized, conveying efficiency is low.Technology does not allow again to satisfy conveying capacity with the method that increases main belt quantity on some flow production line.Aspect the goods transport operation, especially adopt the factory of shipping, factory to harbour all has larger distance, and it is costly to increase a main belt.Therefore pack the method for going on board again after all adopting the grooved belt feeder to transport loose unpacked material to harbour for the producer that produces particle, comminuting matter product.Not only transport plane complex structure, construction investment are big to adopt the grooved belt, and the intact degree of travelling belt are required high, and very easily cause material to scatter and disappear and the two-way pollution of material and environment.Especially have corrosive property, chemical products that adsorbability is big for some, not only cause the transportation device seriously corroded, maintenance workload is big, and all influenced the quality of product to some extent, packing material transmission provided by the present invention compiles control method and has overcome the existing defective of compiling in the technology, space on the main belt is fully utilized, realized the long-distance transportation after the packing, and only need universal flat belt machine transportation simple in structure, avoided adopting all drawbacks of grooved belt feeder loose unpacked material transportation.Be particularly useful for such as large chemical plant, sugar refinery, cement mill, grain processing plant etc. to large packed thing realize from many wrapping machine to vehicle, all fronts automatic packaging transportation of ship.According to the requirement of various processes, dispose corresponding tachogenerator, input pickup, output executing mechanism, this numeral is compiled controller just can be applicable to the similar automatic production line that compiles control or compile other industry of counting of needs.
Claims (3)
1, a kind of packing materials on many belt conveyor are pooled to an autocontrol method on the main belt, it is characterized in that:
The terminal point of each belt conveyor, be equipped with receive load unload the thing actuating unit, its interior switch closure is as sampled signal after advancing thing, respectively unload the thing actuating unit and be arranged in the top of main belt, load space on this section main belt is divided into several loading sections, the loading segment length equals the load width and adds spacing between the load, come the loading situation of these loading sections of trace simulation with the shift register of corresponding figure place, the loading section of respectively unloading thing actuating unit below is a supervision section separately, the corresponding positions of shift register is a monitor bits separately, a tachogenerator is installed on main belt, it is surveyed long calibration and selects according to technological requirement, the main belt distance of surveying long calibration of whenever advancing, sensor just produces a pulse, this pulse is counted by one some presettable counter, its preset count value equals the loading segment length divided by the long calibration of the survey of sensor, presettable counter return zero pulse simultaneously also as the shift pulse of shift register, choose respectively predetermined counter each take turns a certain time sequential pulse and the monitor bits empty signal in the counting and unload the thing actuating unit advanced thing signal three with, each unloads the condition that the thing actuating unit unloads thing as in good time startup, and loading interval or the distance according to the rules on each belt conveyor is pooled on the main belt.
2, a kind ofly packing materials on many belt conveyor be pooled to a numeral on the main belt compile controller circuitry, it is characterized in that:
By IC1, the input end of 1 Schmidt trigger inserts the impulse singla of tachogenerator, IC1,1 mouth is through change-over switch K21,1 and IC10, a position CP end of two decimal scale count splitters of IC11 joins, this CP end is also changeable and IC1 through K switch 21.1, the impulse source mouth that 2 Schmidt triggers and resistance capacitance are formed joins, this impulse source is by the K21.2 energized, insert or short circuit R2 by K22.3, the mouth Y0 to Y9 of IC10 and IC11 and toggle switch K7 to K20 0 to 9 end is corresponding is connected, the selection mouth of toggle switch K7 and K8 and two inputs and door IC2,1 input end connects, IC2,1 mouth and IC10, the Cr end of IC11 connects, the selection mouth of K9 to K20 is imported and first of door IC12 to IC14 with six four respectively, two input end correspondences are joined, six tunnel input signal detection K switch 1 to K6 are joined through the differential circuit of GL1 to GL6 photoelectric isolating circuit and resistance capacitance composition and the S end of six rest-set flip-flops of IC15 to IC17 respectively, the Q end of IC15 to IC17 joins with the 3rd input end of six four inputs with door IC12 to IC14 respectively, the four-input terminal of IC12 to IC14 and six plug CI1 to CT6 plug sleeves join respectively, after the plug tip of the mouth of IC12 to IC14 and six plug CT1 to CT6 joins respectively, again with the corresponding connection of input end of six monostable circuits of IC18 to IC20, the mouth of six monostable circuits of IC18 to IC20 is held corresponding connection with the R of BG1 to BG12 six power amplifier levels input end and IC15 to IC17 respectively, the collecting electrode of six power amplifier levels joins by K24 switch and amplifier power supply positive pole through six relays of J1 to J6 respectively, 14 d type flip flops of IC3 to IC9 are linked to be a right-shift register, the Q end that the left side of shift register is 13 is connected respectively with the plug sleeve of CZ1 to CZ13 socket, the S end is connected with the plug tip reed of CZ1 to CZ13 respectively, the short circuit reed of CZ1 to CZ13 and the S of IC3.1 end and ground wire joint, the Q end of IC3.1 and the Y1 end of IC10 join with the input end of two inputs with door IC2.2, IC2,2 mouth is through change-over switch K22,1 five decade counter input ends forming with IC21 to IC30 and charactron join, the input end of this counting machine also passes through K22,1 and IC1,2 mouth is connected, the R end of five digit counters is through K22,2 and IC10, the Cr end of IC11 and the CP end of shift register join, by IC31 to IC34 inverter buffer and light-emitting diode, the conformable display circuit input end (1) to (6) that resistance is formed joins with the Q of six rest-set flip-flops of IC15 to IC17 end, and (7) to (20) end is held corresponding connection with every Q of shift register respectively.
3, digitial controller as claimed in claim 2 compiles circuit, it is characterized in that:
The shift-register circuit of being formed by IC3 to IC9D binary pair;
The presettable counter circuit of being formed by IC10, IC11 decimal scale count splitter and toggle switch K7, K8;
The pulse select circuit of being formed by K9 to K20 toggle switch and presettable counter output bit-line;
Isolate the incoming signal memory circuit of being formed with IC15 to IC17RS binary pair and resistance capacitance differential circuit by CL1 to CL6 photoelectricity;
By the monostable adjustable delay circuit of forming with W1 to W6 potential device and resistance capacitance of IC18 to IC20;
By IC12 to IC14 four inputs and a condition distinguishing circuit of being formed;
By IC3,1 and IC2,2 count pulses of being formed produce circuit;
The counting display circuit of forming by IC21 to IC30 and charactron;
The simulation display circuit of forming by IC31 to IC34 reverse buffer and light-emitting diode and resistance;
By IC1, this machine pulse oscillation circuit that 2 smit circuits and potential device W7, change-over switch, resistance, electric capacity are formed;
The adapter circuit of being formed by CT1 to CT6 and CZ1 to CZ13 plugs and sockets;
The circuit that connects by change-over switch K21, K22 institute component units circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91112654 CN1028740C (en) | 1991-12-26 | 1991-12-26 | Method for controlling conveying and collecting of packing material and controller circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91112654 CN1028740C (en) | 1991-12-26 | 1991-12-26 | Method for controlling conveying and collecting of packing material and controller circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073647A CN1073647A (en) | 1993-06-30 |
| CN1028740C true CN1028740C (en) | 1995-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91112654 Expired - Fee Related CN1028740C (en) | 1991-12-26 | 1991-12-26 | Method for controlling conveying and collecting of packing material and controller circuit thereof |
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| CN (1) | CN1028740C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448749C (en) * | 2006-01-04 | 2009-01-07 | 青岛青食有限公司 | Automatic-feeding metered-packing biscuit production process |
| CN103017809B (en) * | 2011-09-28 | 2016-01-20 | 大亚人造板集团有限公司 | A kind of artificial board product line photoelectric sensor fault automatic identifying method |
| CN106494880B (en) * | 2016-11-29 | 2018-11-27 | 广东天机工业智能***有限公司 | Strip magnetic part auto-sequencing organisation of working |
| CN109178429A (en) * | 2017-03-10 | 2019-01-11 | 李鲜元 | A kind of protection sleeve pipe counting device |
| CN109956109A (en) * | 2017-12-14 | 2019-07-02 | 湖南中联重科混凝土机械站类设备有限公司 | A kind of packing machine control equipment, system, method and engineering machinery |
| CN109956108B (en) * | 2017-12-14 | 2022-05-24 | 湖南中联重科混凝土机械站类设备有限公司 | Control equipment, system and method for packing machine and engineering machinery |
| CN109956110A (en) * | 2017-12-14 | 2019-07-02 | 湖南中联重科混凝土机械站类设备有限公司 | A kind of packing machine control equipment, system, method and engineering machinery |
| CN109956111B (en) * | 2017-12-14 | 2022-01-14 | 湖南中联重科混凝土机械站类设备有限公司 | Control equipment, system and method for packing machine and engineering machinery |
| CN108614458B (en) * | 2018-05-30 | 2020-10-02 | 中国神华能源股份有限公司 | Trigger, and method and device for determining output state of trigger |
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- 1991-12-26 CN CN 91112654 patent/CN1028740C/en not_active Expired - Fee Related
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| CN1073647A (en) | 1993-06-30 |
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