CN102151631B - Sprinkling control method and device for engineering machinery - Google Patents
Sprinkling control method and device for engineering machinery Download PDFInfo
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- CN102151631B CN102151631B CN201110032965A CN201110032965A CN102151631B CN 102151631 B CN102151631 B CN 102151631B CN 201110032965 A CN201110032965 A CN 201110032965A CN 201110032965 A CN201110032965 A CN 201110032965A CN 102151631 B CN102151631 B CN 102151631B
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Abstract
The invention discloses a sprinkling control method and a device for engineering machinery. The method comprises the following steps: setting at least two water pumps; setting the sprinkling amount and the water pump switching time for controlling the work time of each water pump; selecting at least two normal water pumps; and starting the selected water pumps in turn according to the sprinkling amount and the water pump switching time so as to carry out the sprinkling operation. The device comprises a control unit (1), a sprinkling amount adjuster (2) which is used for controlling the sprinkling amount, a water pump unit (3), a parameter storage module (4) which is used for storing the water pump switching time and a water pump detection unit (5) which is used for detecting the work state of the current water pump. The sprinkling control method and the device for engineering machinery have the advantages of being high in automation degree, simple for operation, long in service of motors of the water pumps, convenient for debugging and low in cost and realizing the synchronous walking of engineering machinery.
Description
Technical field
The present invention relates to engineering machinery field, be specifically related to a kind of spray control method and device that possesses the engineering machinery of sprinkle water function.
Background technology
Engineering machinery such as road roller are being carried out spreading when construction to the road tar material, steel wheel adheres to the pitch material easily, thereby can cause the flatness of compacting to be damaged, when viscous is serious even can interrupt the construction of road roller.General solution is to be sprinkled water in the steel wheel surface at present, makes the steel wheel surface form the very thin moisture film of one deck, can prevent effectively that the pitch material from sticking to the steel wheel surface.But when watering, too fast if watering too much can make asphalt temperature reduce again, influence the construction quality of paving the way; If road roller stops on the uncooled asphalt surface course and but also sprinkling water, then can form a hard trace, the quality that same influence is paved the way and constructed at the asphalt surface course that contacts with steel wheel.When using the different pitches material to pave the way, the pitch material is different to the viscosity of steel wheel, also requires required watering amount also different.Therefore both having required road roller to begin construction just needs to open watering, then stops watering during parking, and watering amount scalable when requiring different paveio(u)rs.
Prior art extensively adopts the watering of following two kinds of methods control road roller:
(1) provide the percentage signal by potentiometer or handle, deliver to sprinkler controller, sprinkler controller calculates according to set-point and the electric current of output control watering motor or the signal of automatically controlled ratio water valve, to adjust the percentage that actual watering amount accounts for maximum watering amount.The watering amount is adjustable continuously, and regulated quantity is according to potentiometer or handle set-point and ratio changes.This method requires the long-term operation continuously of watering motor, and causes motor is damaged easily, and the life-span is not long.If the running current through regulating the watering motor is regulated the watering amount, the motor of then sprinkling water is under the non-rated voltage for a long time works, and can make the shortening aggravation in service life of watering motor.Actual watering atomizing effect is bad, causes water smoke inhomogeneous, and then influence watering effect.
(2) by the given gear signal of multi-gear switch, the water pump selector switch is selected No. 1 watering motor or No. 2 watering motors, and controller is according to the signal of two switches, and what provide corresponding water pump opens, stops control signal.Two water pumps of the general employing of system, one is feed pump, another is a reserve pump, selects to use some water pumps through artificial switching.According to the gear of multi-gear switch, given some water pumps back and forth open, stop transport the capable cycle, reach the adjusting of watering amount through the difference that opens, stops the cycle.There are following two deficiencies in this method: 1. switch two water pumps through artificial the manipulation fully, the operator forgets usually regularly and switches in construction, but finds that by the time feed pump broken, and switches to reserve pump again.Therefore can not effectively protect the watering motor.2. sprinkle water the driving power of motor with the frequent loading of the form of switching value be unloaded at motor, and this frequency normally opens, stops a minor tick several seconds, the watering motor moves under this operating mode for a long time, damages easily equally.
Summary of the invention
The technical problem that the present invention will solve is: provide a kind of automaticity high, simple to operate, can realize with engineering machinery walking synchronously, the pump motor life-span is long, debugging is convenient, lower-cost spray control method and the device that is used for engineering machinery.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of spray control method that is used for engineering machinery is characterized in that implementation step is following:
1) at least two water pumps is set;
2) watering amount and be used to control water pump switching time of each pump working time is set;
3) select at least two normal water pumps;
4) when construction takes turns starting the operation of sprinkling water with the water pump selected switching time based on said watering amount and water pump.
Spray control further improvements in methods as engineering machinery of the present invention:
Water pump to current startup when sprinkling water operation in the said step 4) detects in real time; If the water pump of current startup breaks down; Then at first this water pump is labeled as fault and output alarm signal; Carrying out judgment processing according to the normal water pump quantity of residue then, is more than two if remain normal water pump quantity, then returns and carries out said step 3); If remaining the quantity of normal water pump is one, then select to start the operation of sprinkling water of this water pump; If remain normal water pump quantity is zero, then stops the operation of sprinkling water.
The duty of the current startup water pump of said detection is meant current output hydraulic pressure is detected, if current output hydraulic pressure is lower than preset pressure value, judges that then current water pump breaks down.
Before the said step 4) in real time the travel speed of work machine whether be positioned at meta with go handle or driving pump, engineering machinery go sprinkle water in advance immediately after handle or driving pump leave meta operation, going in engineering machinery just stops the operation of sprinkling water after handle or driving pump are positioned at meta when travel speed is zero.
When the water pump of controlling current startup according to the watering amount in the said step 4) is sprinkled water operation; The watering amount control signal that exports water pump to is a periodic signal of square wave, the intermittence Starting mode control watering amount of the water pump of current startup through starting during for high level in said periodic signal of square wave, stopping during for low level in said periodic signal of square wave.
The water pump of said current startup is used to start the output current I of water pump with Starting mode when operation at intermittence
1Increase gradually, be used to stop the output current I of water pump
2Reduce gradually.
Starting current increment Delta I is set said step 2) in the lump
1With stop current increment Δ I
2, the said output current I that is used to start water pump
1Be I
1=I
10+ Δ I
1, the said output current I that is used to stop water pump
2Be I
2=I
20-Δ I
2, I wherein
10Initial output current during for starting mode of pump, I
20Initial output current when stopping for water pump.
Comprise the mode of operation that is provided for controlling water pump before the said step 3); Said mode of operation comprises automatic switchover mode and has the manual designated mode of specifying water pump information; When mode of operation is carried out said step 3) during for automatic switchover mode, when mode of operation is manual designated mode then according to starting said appointment water pump according to watering amount sprinkle water operation or watering debugging.
A kind of spray control device that is used for engineering machinery; It comprises control module, is used to control watering amount adjuster, the water pump unit of watering amount; It also comprises the water pump detecting unit of the parameter memory module that is used to store water pump switching time and the duty that is used to detect current water pump; Said control module links to each other with watering amount adjuster, water pump unit, parameter memory module, water pump detecting unit respectively; Said water pump unit comprises at least two water pumps; When said water pump detection normal water pump quantity in the water pump unit is two when above, at least two normal water pumps of said control module control take turns starting the operation of sprinkling water switching time according to said watering amount and water pump.
Further improvement as the spray control device of engineering machinery of the present invention:
Said control module comprises also whether be used to go handle or driving pump are positioned at the transport condition detecting unit and the travel speed detecting unit that is used for the work machine travel speed of meta, said control module according to the detection information Control water pump unit of said transport condition detecting unit and the input of travel speed detecting unit engineering machinery go sprinkle water in advance immediately after handle or driving pump leave meta operation, going in engineering machinery just stops the operation of sprinkling water when being zero until travel speed after handle or driving pump are positioned at meta.
Said transport condition detecting unit be located at engineering machinery go handle meta place near switch; Said control module comprises the mode selector switch that is used for controlling said water pump unit pump working pattern, and said watering amount adjuster is the square wave signal generator of EDM Generator of Adjustable Duty Ratio joint.
Said water pump detecting unit is for detecting the pressure sensor of watering force value, and said pressure sensor is located in the primary flow pipe of said water pump unit or in the said water pump unit in the outlet pipe of each water pump.
The spray control method that the present invention is used for engineering machinery has following advantage:
1, the present invention can realize the automatic control of many water pumps; Automatically select the water pump operation of alternately sprinkling water; Prevent the long-term continuous firing of single water pump; Can prolong the integral body watering fault-free activity duration of engineering machinery, have the automaticity height, simple to operate, the pump motor life-span long, the debugging convenient, lower-cost advantage.
2, the present invention detects through the water pump to current startup in real time; Can, water pump also select to switch water pump automatically by output alarm signal when breaking down; Even surplus next normal water pump still can keep the operation of sprinkling water normally, the fault-free work capacity is stronger, good reliability.
3, the present invention realizes detecting the duty of current pump motor through detecting current output hydraulic pressure, so detection mode is simple and reliable, and is simple in structure, and the parts that detect use are few, cost is lower.
4, whether the present invention is positioned at the state that transport condition that meta and travel speed realize combining engineering machinery is controlled the watering operation through go handle or driving pump of real-time detection; Can carry out precise synchronization watering operation with the transport condition of engineering machinery; Realize watering in advance, after engineering machinery stops fully, just stop watering, can effectively improve the validity of watering operation, the steel wheel that prevents engineering machinery adhere to the pitch material, with the raising construction quality of paving the way.
5, water pump of the present invention with intermittence start-up mode control the watering amount, make pump motor under rated voltage, work, can effectively protect pump motor, prolong the service life of pump motor.And the output current that is used to start water pump increases gradually; The output current that is used to stop water pump reducing gradually; The progressively method of increase and decrease through stream that pump motor is opened, has a power failure; Can prevent the impact that pump motor brought because of the pump motor that frequently opens, cuts off the water, thereby can effectively protect pump motor and prolong service life of pump motor.The present invention is through the mode of operation of mode selector switch control water pump, and debugging is convenient, uses flexible, simple and reliable.
Therefore the spray control device that is used for engineering machinery of the present invention also should possess the above-mentioned corresponding advantage of spray control method that is used for engineering machinery owing to having the above-mentioned corresponding structure of spray control method that is used for engineering machinery.
Description of drawings
Fig. 1 is the implementing procedure sketch map of embodiment of the invention method;
Fig. 2 is the frame structure sketch map of embodiment of the invention device;
Fig. 3 is the detailed framework structural representation of embodiment of the invention device;
Fig. 4 is the corresponding relation sketch map that watering amount adjuster is exported periodic signal of square wave and watering amount in the embodiment of the invention;
Fig. 5 is the schematic flow sheet when select starting water pump based on mode of operation in the embodiment of the invention;
Fig. 6 is the action sequence sketch map that select to start pump motor in the embodiment of the invention based on mode of operation;
Fig. 7 is positioned at the sketch map that concerns of meta for watering job state and engineering machinery travel speed, the handle that goes in the embodiment of the invention;
Fig. 8 is the start and stop schematic flow sheet of pump motor in the embodiment of the invention;
Fig. 9 is the start and stop output current curve synoptic diagram of pump motor in the embodiment of the invention.
Marginal data: 1, control module; 10, controller; 11, transport condition detecting unit; 12, travel speed detecting unit; 13, electric-motor drive unit; 14, mode selector switch; 15, input-output unit; 16, timer; 2, watering amount adjuster; 3, water pump unit; 31, water pump; 4, parameter memory module; 5, water pump detecting unit.
The specific embodiment
As shown in Figure 1, the implementation step of the spray control method of embodiment of the invention engineering machinery is following:
1) at least two water pumps is set;
2) watering amount and be used to control water pump switching time of each pump working time is set;
3) select at least two normal water pumps;
4) when construction takes turns starting the operation of sprinkling water with the water pump selected switching time based on watering amount and water pump.
Wherein, Water pump to current startup when sprinkling water operation in the step 4) detects in real time; If the water pump of current startup breaks down, then at first this water pump is labeled as fault and output alarm signal, carry out judgment processing according to the normal water pump quantity of residue then; If remaining normal water pump quantity is more than two, then return execution in step 3); If remaining the quantity of normal water pump is one, then select to start the operation of sprinkling water of this water pump; If remain normal water pump quantity is zero, then stops the operation of sprinkling water.In the present embodiment, the duty that detects current startup water pump is meant current output hydraulic pressure is detected, if current output hydraulic pressure is lower than preset pressure value, judges that then current water pump breaks down.
Synchronous in order to realize with the transport condition of engineering machinery; Before the step 4) in real time the travel speed of work machine whether be positioned at meta with go handle or driving pump, engineering machinery go sprinkle water in advance immediately after handle or driving pump leave meta operation, going in engineering machinery just stops the operation of sprinkling water after handle or driving pump are positioned at meta when travel speed is zero.In the present embodiment, at first detect go handle or driving pump and whether be positioned at meta, if go handle or driving pump leave meta, if this moment engineering machinery travel speed greater than zero execution in step 4), otherwise start the water pump operation of sprinkling water in advance; Handle or driving pump return meta if go, if this moment engineering machinery travel speed then stop the operation of sprinkling water when being zero, otherwise continue execution in step 4).
When the water pump of controlling current startup according to the watering amount in the step 4) is sprinkled water operation; The watering amount control signal that exports water pump to is a periodic signal of square wave, the intermittence Starting mode control watering amount of the water pump of current startup through starting during for high level in periodic signal of square wave, stopping during for low level in periodic signal of square wave.For the impact that prevents that water pump from bringing pump motor because of the pump motor that frequently opens, cuts off the water with start-up mode when operation at intermittence, the water pump of current startup is used to start the output current I of water pump so that intermittence, Starting mode was moved
1Increase gradually, be used to stop the output current I of water pump
2Reduce gradually.In the present embodiment, step 2) in starting current increment Delta I is set in the lump
1With stop current increment Δ I
2, be used to start the output current I of water pump
1Be I
1=I
10+ Δ I
1, be used to stop the output current I of water pump
2Be I
2=I
20-Δ I
2, I wherein
10Initial output current during for starting mode of pump, I
20Initial output current when stopping for water pump.
In the present embodiment; Comprise the mode of operation that is provided for controlling water pump before the step 3); Mode of operation comprises automatic switchover mode and has the manual designated mode of specifying water pump information; Execution in step 3 when mode of operation is automatic switchover mode), when mode of operation is manual designated mode then according to start specifying water pump according to watering amount sprinkle water operation or watering debugging.
As shown in Figures 2 and 3; The spray control device of the engineering machinery of the embodiment of the invention comprises control module 1, is used to control watering amount adjuster 2, the water pump unit 3 of watering amount; It also comprises the water pump detecting unit 5 of the parameter memory module 4 that is used to store water pump switching time and the duty that is used to detect current water pump; Control module 1 links to each other with watering amount adjuster 2, water pump unit 3, parameter memory module 4, water pump detecting unit 5 respectively; Water pump unit 3 comprises at least two water pumps 31; When water pump detecting unit 5 detects in the water pump unit 3 normal water pump 31 quantity is two when above, and at least two normal water pumps 31 of control module 1 control take turns starting the operation of sprinkling water switching time according to watering amount and water pump.
In the present embodiment; Control module 1 comprises also whether be used to go handle or driving pump are positioned at the transport condition detecting unit 11 and the travel speed detecting unit 12 that is used for the work machine travel speed of meta, control module 1 according to the detection information Control water pump unit 3 of transport condition detecting unit 11 and 12 inputs of travel speed detecting unit engineering machinery go sprinkle water in advance immediately after handle or driving pump leave meta operation, going in engineering machinery just stops the operation of sprinkling water after handle or driving pump are positioned at meta when travel speed is zero.In the present embodiment, go if transport condition detecting unit 11 is exported high level handle or driving pump are in meta, and this moment, then travel speed should be zero if engineering machinery is current stops; Then travel speed is greater than zero just in the still complete as yet inactive state of dead ship condition if engineering machinery is current, and the operation that continues to sprinkle water this moment is static fully until engineering machinery.If transport condition detecting unit 11 output low levels, then for go handle or driving pump not at meta, this moment, then travel speed was greater than zero if engineering machinery is in the cruising state; If engineering machinery is current to be moment state at the early-stage, then travel speed should be zero, the operation of need sprinkling water in advance this moment.
In the present embodiment, control module 1 also comprises the mode selector switch 14 that is used for controlling water pump unit 3 water pumps, 31 mode of operations.Transport condition detecting unit 11, travel speed detecting unit 12 and mode selector switch 14 link to each other with the controller 10 of control module 1 respectively, and control module 1 links to each other with water pump unit 3 through electric-motor drive unit 13.
Transport condition detecting unit 11 can be to go the handle meta near switch, also can be the meta signal of handle sensor or the meta signal of driving pump.Engineering machinery to overtake when the handle that goes was positioned at anteposition, engineering machinery is gone backward when being positioned at the position, back, engineering machinery stops when being positioned at meta; When driving pump was positioned at meta, driving pump had not both had forward output, also not reverse output, and engineering machinery stops, thereby can be through the transport condition of transport condition detecting unit 11 work machine.In the present embodiment transport condition detecting unit 11 for be located at engineering machinery go handle meta place near switch, the handle that goes is positioned at then transport condition detecting unit 11 output high level of meta, otherwise output low level.
Travel speed detecting unit 12 produces the characterization signal of engineering machinery travel speed; Can produce signal by motor rotary speed sensor, velocity sensor or the handle displacement transducer that goes; And calculate the travel speed value that characterizes engineering machinery, the preferred driving motors speed probe that adopts in the present embodiment through control module 1.
For convenience, water pump unit 3 comprises two water pump 31:1# water pumps and 2# water pump in the present embodiment, the corresponding pump motor of each water pump, and control module 1 links to each other with pump motor through electric-motor drive unit 13.
Watering amount adjuster 2 is the square wave signal generator of EDM Generator of Adjustable Duty Ratio joint.Watering amount adjuster 2 can adopt any multi-gear switch, and control module 1 is recently judged the watering amount that needs output through the duty of periodic signal of square wave.Preferred P0～the P11 of present embodiment is totally 12 gear switch, and wherein the P0 shelves are for closing the watering shelves, and the P11 shelves are continuously the watering shelves, and middle P0～P10 dutycycle of totally 10 gear output periodic signal of square wave increases successively, to realize the duration of sprinkling water 10 kinds of different intermittences respectively.The description that Fig. 4 is detailed the output signal characteristic of watering amount adjuster 2 each grades, and be described in total watering amount of the interior sprinkler system of certain hour section (such as an engineering time).The P0 shelves are lock catch, and watering amount adjuster 2 is output low level all the time; The P11 shelves are continuously shelves, and watering amount adjuster 2 is exported high level all the time; Totally 10 gear watering amount adjusters 2 of middle P0～P10 exports the periodic signal of square wave of different duty successively, and the watering amount that dash area characterizes native system control accounts for the percentage of maximum watering amount.According to the principle of this programme, the long more gear of output high level time, then in the cycle of periodic signal of square wave, the net cycle time of water pump 31 is long more, and total watering amount is directly proportional with the net cycle time of pump motor, therefore total watering amount is many more; During the P11 shelves, the maximum watering amount of native system control output, also i.e. watering continuously.The pump motor that the watering amount is used to control water pump 31 is with start-up mode operation at intermittence; The dutycycle of the periodic signal of square wave of watering amount adjuster 2 outputs is big more; Then the start-up time of pump motor in the one-period square-wave signal cycle is longer, dwell time is short more, thereby the watering amount that realizes output is big more.
Store water pump Tc switching time, starting current increment Delta I in the parameter memory module 4
1, stop current increment Δ I
2Default value, but engineering machinery start time, can be through input-output unit 15 interim input above-mentioned parameters.
Water pump detecting unit 5 is for detecting the pressure sensor of watering force value, and pressure sensor is located in the primary flow pipe of water pump unit 3 or in the water pump unit 3 in the outlet pipe of each water pump 31.In the present embodiment, pressure sensor is located in the primary flow pipe of water pump unit 3, and the force value of pressure sensor output is lower than preset pressure value, judges that then current water pump breaks down.Present embodiment is judged whether fault of current water pump 31 with the pressure sensor of watering outlet one side; Other the mode that can characterize current water pump 31 faults still in the method for this case, detects modes such as rotating speed of motor such as the motor current sensor value of feedback of utilizing pump motor, pump motor speed probe.
As shown in Figure 5, timer 16 brings into operation and produces periodic signal of square wave, and the dutycycle of periodic signal of square wave is 1:1, and the cycle of periodic signal of square wave is 2 times of water pump Tc switching time.After the engineering machinery operation; Timer 16 trigger control unit 1 that brings into operation at first; Control module 1 reads the output square-wave signal of watering amount adjuster 2, the output signal of read mode change-over switch 14; If select the output automatic switchover mode, then control module 1 control is selected at least two water pumps 31 and is taken turns starting the operation of sprinkling water; If 1# water pump pattern is manually specified in output, then select to start the operation of sprinkling water of 1# water pump; If 2# water pump pattern is manually specified in output, then start the operation of sprinkling water of 2# water pump; Otherwise withdraw from automatic switchover mode.In a single day the periodic signal of square wave level that timer 16 produces changes, and control module 1 switches to next water pump 31 immediately under automatic switchover mode.Controller carries out the selection of water pump 31 through the level signal of timer 16 outputs, if timer 16 output high level then start the 1# water pump; If timer 16 output low levels then start the 2# water pump.Since timer 16 continue output duty cycles be the square wave of 1:1 for replacing high and low level signal, so can be implemented in that 1# water pump and 2# water pump take turns starting the operation of sprinkling water under the automatic switchover mode.
As shown in Figure 6; Auto representes mode selector switch 14 output automatic switchover modes; 1# pump – swtich representes manually appointment 1# water pump pattern of mode selector switch 14 outputs; 2# pump – swtich representes manually appointment 2# water pump pattern of mode selector switch 14 outputs, and 12-P – switch representes the output watering amount of watering amount adjuster 2, and ton1.Q representes the output state signal of timer 16 according to parameter memory module 4 stored parameters water pump Tc switching time operation; 1# pump representes the duty of 1# water pump, and 2# pump representes the duty of 2# water pump.Can find out that by last figure under automatic switchover mode, 1# water pump and 2# water pump take turns starting, and the watering amount of recently regulating the 1# water pump or the 2# water pump of each current operation based on the duty of the output watering amount of watering amount adjuster 2; Manually specify under the 1# water pump pattern, only by the 1# water pump operation, and the watering amount of recently regulating the 1# water pump based on the duty of the output watering amount of watering amount adjuster 2; Manually specify under the 2# water pump pattern, only by the 2# water pump operation, and the watering amount of recently regulating the 2# water pump based on the duty of the output watering amount of watering amount adjuster 2.
As shown in Figure 7, the figure medium velocity is 0 to represent engineering machinery to remain static, speed on the occasion of being in the transport condition that moves forward and backward with the corresponding respectively engineering machinery of negative value.In the present embodiment, whether the combination of meta status information of the engineering machinery travel speed and the handle that goes is used to differentiate engineering machinery and will constructs, be in the normal construction state, be in switching-over construction state, be in dead ship condition, engineering machinery and stopped the construction state.Handle leaves meta if go, and shows that then machine will construct, and the spray control device of present embodiment starts and brings into operation according to the output information of watering amount adjuster 2 and mode selector switch 14, at first to the operation of sprinkling water in advance of the steel wheel of engineering machinery; Then detect travel speed, if the travel speed after this in a period of time thinks then that greater than 0 engineering machinery is in the normal construction state, sprinkler system puts into operation automatically and does not need operating personnel's manual operation; If travel speed v is always zero, then thinks transport condition detecting unit 11 faults and end watering.Wherein: t1 is that engineering machinery is prepared starting constantly, and this moment, the speed of engineering machinery steel wheel was 0 still, did not have water on the steel wheel, needed watering in advance, and steel wheel adheres to pitch when preventing to start, therefore constantly at t1, and the operation and continue 2S of sprinkling water at first in advance.Proofread and correct with the travel speed of engineering machinery simultaneously,, then stop watering, avoid owing to the watering of malfunctioning switch mistake is wasted if travel speed still is 0 behind the transport condition detecting unit 11 output high level disappearance 2S.T2～t3 is an engineering machinery switching-over running time section, state detection unit 11 output low levels of going in during this period of time, and the travel speed of travel speed detecting unit 12 outputs is become oppositely by the forward vanishing again, and control is sprinkled water and is not interrupted.T4 is an engineering machinery when being prepared to stop, and at first detects travel speed detecting unit 12 output high level, and behind Δ t=t5-t4, travel speed gradually becomes zero, and two characteristics satisfy simultaneously and then stop watering.Be not difficult to find; Under the situation that adopts two water pumps 31, when automatically switching to another water pump 31, if also need continue construction in current water pump 31 damages; Then the water pump 31 of this work still keeps going synchronously with engineering machinery; And continue to operate in intermittently start-up mode, and control the method for 1 water pump 31 automatic start-stop, still be contained within the technical scheme of the present invention.
As shown in Figure 8, control module 1 comes pump motor to water pump 31 to start respectively based on the rising edge of watering amount adjuster 2 output square-wave signals and trailing edge and shuts down processing.If detect rising edge, control module 1 pump motor that need to start of selection at first then is then to this pump motor output current I
1Be I
1=I
10+ Δ I
1, the I of each cycle output
1Increase progressively, until I
1Equal the rated current I of pump motor
RatingTill; If detect trailing edge, then control module 1 is to current pump motor output current I
2Be I
2=I
20-Δ I
2, the I of each cycle output
2Successively decrease, until I
2Equal zero, wherein I
10Initial output current during for starting mode of pump, I
20Initial output current when stopping for water pump, Δ I
1Be starting current increment, Δ I
2For stopping current increment.
As shown in Figure 9, I
RatingThe rated current of expression pump motor, Pump-Start represent the to sprinkle water control signal of electric motor starting.Δ t1 is start-up time among the figure, Δ t1=(I
Rating/ Δ I
1) * T
nΔ t2 is down time, Δ t2=(I
Rating/ Δ I
2) * T
n, T in the formula
nBe the circular treatment cycle of controller 10 internal processes; Tc is water pump switching time.Usually start-up time, Δ t1 and parking Δ t2 were shorter than the high level lasting time of the P1 shelves output of watering amount adjuster 2.Can know through opening, stop the control of curve by figure, the starting current of pump motor is strengthened gradually, stop electric current and reduce gradually, can guarantee the impact that starts smoothly and avoid frequent directly pressurization that motor is produced.
As shown in Figure 1, the course of work after engineering machinery is opened in the present embodiment is following:
1) parameter is selected.First-selected signal according to input-output unit 15 inputs is selected parameter, if operating personnel through input-output unit 15 manual amendment's parameters, then store above-mentioned parameters and are written into parameter in parameter memory module 4 behind operating personnel's input parameter; Otherwise just directly read and be written into stored parameters default value or last construction setting value in the parameter memory module 4.
2) judge watering amount adjuster 2.If watering amount adjuster 2 places the P0 shelves, then stop the operation of sprinkling water, otherwise get into next step.
3) output state of judgment model selector switch 14 if mode selection switch 14 is output as manual designated mode, is then selected corresponding water pump 31 and based on watering amount manually sprinkle water operation or watering debugging.Mode selection switch 14 is output as automatic switchover mode else if, gets into next step.
4) carry out automatic spray control.
Under automatic switchover mode; Obtain the output signal of transport condition detecting unit 11, travel speed detecting unit 12 in real time: if transport condition detecting unit 11 output low levels; Then think engineering machinery will go (during the meta blackout) or go; If this moment, the engineering machinery travel speed was not equal to zero, explains that engineering machinery has been in the construction state that goes, thereby sprinkle water operation in turn; If the engineering machinery travel speed equals zero, explain that engineering machinery has just been handled driving system but also starting, control module 1 control water pump unit 3 operation of sprinkling water in advance this moment is stained with pitch when the starting to stop steel wheel.When implementing to sprinkle water operation in advance, judge the travel speed of engineering machinery through time-delay 2S in the present embodiment, if the speed of engineering machinery is zero behind the operation 2S that sprinkles water in advance, judges that then machine breaks down, thereby stop the operation of sprinkling water; Otherwise get into the operation of sprinkling water automatically of automatic spray control pattern control water pump.If transport condition detecting unit 11 output high level; Think that then engineering machinery will stop (when the meta signal occurs) or stop; If this moment, if the engineering machinery travel speed was not equal to zero then think that engineering machinery stops; Then proceed the operation of sprinkling water, when the engineering machinery travel speed equals zero, stop the operation of sprinkling water.Under automatic switchover mode, water pump detecting unit 5 detects the duty of the water pump 31 of current operation in real time.Water pump detecting unit 5 detects the watering hydraulic pressure of current output in real time; If watering hydraulic pressure is lower than preset pressure value; Then think water pump 31 faults of current operation; Control module 1 is labeled as fault water pump and output alarm signal with this water pump 31, if a remaining water pump 31 is normal water pump, then switches to this normal water pump 31 and through its operation of sprinkling water; If all water pumps 31 all have been marked as fault, output alarm signal and stop the operation of sprinkling water then.It only is for convenience of description that present embodiment adopts two water pumps 31, in fact can adopt more water pump 31.When adopting 3 or more water pump 31, if watering hydraulic pressure is lower than preset pressure value, then at first judge the quantity of the normal water pump 31 of residue, if be two or more, then selected two or more water pumps 31 take turns starting the operation of sprinkling water; If remain a normal water pump 31, and switch to the operation of sprinkling water of this normal water pump 31; If the quantity of remaining normal water pump 31 is zero, then stop the operation of sprinkling water.Under automatic switchover mode, if the watering amount is improper, can be through regulate the size of watering amount in real time through watering amount adjuster 2.In the present embodiment; The status information of the alarm signal that water pump 31 breaks down and all water pumps 31 can show through input-output unit 15; When observing, the operator shows it is some water pump 31 operations or the low warning message of watering pressure all the time on the input-output unit 15; Then should intermittently in time overhaul and fix a breakdown, and should not wait until that two water pumps 31 process when all damaging again in construction.
The present invention need also can be used to road roller or other perhaps engineering machinery of oil spout of need spraying water of oil spout in addition except being applicable to the road roller that need sprinkle water.
The above is merely preferred implementation of the present invention, and protection scope of the present invention is not limited in above-mentioned embodiment, and all technical schemes that belongs to the principle of the invention all belong to protection scope of the present invention.To those skilled in the art, some improvement and the retouching under the prerequisite that does not break away from principle of the present invention, carried out, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (11)
1. spray control method that is used for engineering machinery is characterized in that implementation step is following:
1) at least two water pumps is set;
2) watering amount and be used to control water pump switching time of each pump working time is set;
3) select at least two normal water pumps;
4) when construction takes turns starting the operation of sprinkling water with the water pump selected switching time based on said watering amount and water pump;
Water pump to current startup when sprinkling water operation in the said step 4) detects in real time; If the water pump of current startup breaks down; Then at first this water pump is labeled as fault and output alarm signal; Carrying out judgment processing according to the normal water pump quantity of residue then, is more than two if remain normal water pump quantity, then returns and carries out said step 3); If remaining the quantity of normal water pump is one, then select to start the operation of sprinkling water of this water pump; If remain normal water pump quantity is zero, then stops the operation of sprinkling water.
2. the spray control method that is used for engineering machinery according to claim 1; It is characterized in that: the duty of the current startup water pump of said detection is meant current output hydraulic pressure is detected; If current output hydraulic pressure is lower than preset pressure value, judge that then current water pump breaks down.
3. according to the described spray control method that is used for engineering machinery of claim 1; It is characterized in that: before the said step 4) in real time the travel speed of work machine whether be positioned at meta with go handle or driving pump, engineering machinery go sprinkle water in advance immediately after handle or driving pump leave meta operation, going in engineering machinery just stops the operation of sprinkling water after handle or driving pump are positioned at meta when travel speed is zero.
4. according to claim 1 or the 2 or 3 described spray control methods that are used for engineering machinery; It is characterized in that: when the water pump of controlling current startup according to the watering amount in the said step 4) is sprinkled water operation; The watering amount control signal that exports water pump to is a periodic signal of square wave, the intermittence Starting mode control watering amount of the water pump of current startup through starting during for high level in said periodic signal of square wave, stopping during for low level in said periodic signal of square wave.
5. the spray control method that is used for engineering machinery according to claim 4 is characterized in that: the water pump of said current startup is used to start the output current I of water pump with Starting mode when operation at intermittence
1Increase gradually, be used to stop the output current I of water pump
2Reduce gradually.
6. the spray control method that is used for engineering machinery according to claim 5 is characterized in that: starting current increment Delta I is set said step 2) in the lump
1With stop current increment Δ I
2, the said output current I that is used to start water pump
1Be I
1=I
10+ Δ I
1, the said output current I that is used to stop water pump
2Be I
2=I
20-Δ I
2, I wherein
10Initial output current during for starting mode of pump, I
20Initial output current when stopping for water pump.
7. according to claim 1 or the 2 or 3 described spray control methods that are used for engineering machinery; It is characterized in that: comprise the mode of operation that is provided for controlling water pump before the said step 3); Said mode of operation comprises automatic switchover mode and has the manual designated mode of specifying water pump information; Carry out said step 3) when mode of operation during for automatic switchover mode, when mode of operation is manual designated mode, then start said appointment water pump according to watering amount sprinkle water operation or watering debugging.
8. spray control device that is used for engineering machinery; It comprises control module (1), is used to control the watering amount adjuster (2) of watering amount, water pump unit (3); It is characterized in that: it also comprises and is used to the water pump detecting unit (5) storing the water pump parameter memory module of switching time (4) and be used to detect the duty of current water pump; Said control module (1) links to each other with watering amount adjuster (2), water pump unit (3), parameter memory module (4), water pump detecting unit (5) respectively; Said water pump unit (3) comprises at least two water pumps (31); When said water pump detecting unit (5) detects in the water pump unit (3) normal water pump (31) quantity is two when above, and said control module (1) at least two normal water pumps of control (31) take turns starting the operation of sprinkling water switching time according to said watering amount and water pump.
9. the spray control device that is used for engineering machinery according to claim 8; It is characterized in that: said control module (1) comprises also whether be used to go handle or driving pump are positioned at the transport condition detecting unit (11) of meta and are used for the travel speed detecting unit (12) of work machine travel speed, said control module (1) according to the detection information Control water pump unit (3) of said transport condition detecting unit (11) and travel speed detecting unit (12) input engineering machinery go sprinkle water in advance immediately after handle or driving pump leave meta operation, going in engineering machinery just stops the operation of sprinkling water after handle or driving pump are positioned at meta when travel speed is zero.
10. the spray control device that is used for engineering machinery according to claim 8; It is characterized in that: said transport condition detecting unit (11) for be located at engineering machinery go handle meta place near switch; Said control module (1) comprises the mode selector switch (14) that is used for controlling said water pump unit (3) water pump (31) mode of operation, and said watering amount adjuster (2) is the square wave signal generator of EDM Generator of Adjustable Duty Ratio joint.
11. according to Claim 8 or the 9 or 10 described spray control devices that are used for engineering machinery; It is characterized in that: said water pump detecting unit (5) is for detecting the pressure sensor of watering force value, and said pressure sensor is located in the primary flow pipe of said water pump unit (3) or in the said water pump unit (3) in the outlet pipe of each water pump (31).
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| CN201110032965A CN102151631B (en) | 2011-01-31 | 2011-01-31 | Sprinkling control method and device for engineering machinery |
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| CN201110032965A CN102151631B (en) | 2011-01-31 | 2011-01-31 | Sprinkling control method and device for engineering machinery |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102864723A (en) * | 2012-09-14 | 2013-01-09 | 徐州万邦道路工程装备服务股份公司 | Intermittent water-sprinkling device for road roller with double steel wheel |
| CN104480836A (en) * | 2014-12-03 | 2015-04-01 | 柳工无锡路面机械有限公司 | Adjustable watering device for double-drum road roller |
| CN109098069A (en) * | 2017-06-20 | 2018-12-28 | 徐工集团工程机械股份有限公司 | sprinkling control method, device and road roller |
| US11591758B2 (en) * | 2019-12-10 | 2023-02-28 | Caterpillar Paving Products Inc. | Work machines and systems for monitoring wear of components of work machines |
| CN114365970B (en) * | 2021-12-09 | 2023-06-09 | 深圳市朗科智能电气股份有限公司 | Waxing method for floor washing machine |
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| CN2931560Y (en) * | 2006-07-25 | 2007-08-08 | 长沙中联重工科技发展股份有限公司 | Watering device for road roller |
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| US6827524B2 (en) * | 2002-07-26 | 2004-12-07 | Ingersoll-Rand Company | Controller for a compacting vehicle wetting system |
| JP4034203B2 (en) * | 2003-02-13 | 2008-01-16 | 酒井重工業株式会社 | Watering device for rolling compaction vehicle |
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| CN201006973Y (en) * | 2006-03-31 | 2008-01-16 | 徐州工程机械科技股份有限公司 | Double intelligent steel wheel road rollers intelligent sprinkling control system |
| CN2931560Y (en) * | 2006-07-25 | 2007-08-08 | 长沙中联重工科技发展股份有限公司 | Watering device for road roller |
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Effective date of registration: 20151119 Address after: 413000 Yiyang high tech Zone in the eastern part of the New District of integrated services building, Room 502, Hunan Patentee after: Yiyang science and Technology Achievement Transformation Service Center Patentee after: Sanyi Heavy Industry Co., Ltd. Address before: 410100 31 industrial city, Changsha economic and Technological Development Zone, Hunan, Changsha Patentee before: Sanyi Heavy Industry Co., Ltd. |