CN106402092B - Piston position detection device, method and the engineering machinery of telescopic oil cylinder - Google Patents
Piston position detection device, method and the engineering machinery of telescopic oil cylinder Download PDFInfo
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- CN106402092B CN106402092B CN201611160225.9A CN201611160225A CN106402092B CN 106402092 B CN106402092 B CN 106402092B CN 201611160225 A CN201611160225 A CN 201611160225A CN 106402092 B CN106402092 B CN 106402092B
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- oil cylinder
- cylinder piston
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- piston
- duration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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- Chemical & Material Sciences (AREA)
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- Fluid Mechanics (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The disclosure provides a kind of piston position detection device, method and the engineering machinery of telescopic oil cylinder, and the piston position detection method of the telescopic oil cylinder includes：Receive the instruction that control cylinder piston moves in a first direction；The instruction moved in a first direction according to the control cylinder piston, determines duration and move associated displacement scale coefficient in a first direction with the oil cylinder piston that the oil cylinder piston moves in a first direction；According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a first direction is determined；And the position before being moved in a first direction according to oil cylinder piston displacement in a first direction and the oil cylinder piston, determine the current location of the oil cylinder piston.By the scheme of the disclosure, it is not required to configure extra displacement sensor the problem of can detect that piston position, piston position testing cost is greatly saved, and is maintained there is no the later stage to displacement sensor mechanical energy.
Description
Technical field
The present invention relates to oil cylinder technical field, and in particular, to a kind of piston position detection device of telescopic oil cylinder, method
And engineering machinery.
Background technology
The detection of telescopic oil cylinder piston displacement is a critical data, directly influences the control to the telescopic oil cylinder piston
And the normal operation of the equipment using the telescopic oil cylinder.In existing telescopic oil cylinder, bracing wire linear transducer is often used as oil
The displacement detector of the cylinder piston, by the piston displacement that bracing wire is directly measured to oil cylinder installed in oil cylinder two.Bracing wire length
Sensor is using a kind of mechanical invasive measurement mode, often by exterior various environment such as dust, rainwater, mechanical collisions etc.
Influence, and continually carry out scaling operation, be easy to cause damage, its job stability and precision are adversely affected.
In existing telescopic oil cylinder, also exist and movable magnet ring is accurately detected by internal contactless observation and control technology
Absolute position measures the sensor of the actual displacement value of detected product, such as magneto strictive sensor.The sensor can answer
In most evil bad industrial environment, it is not easy to be influenced by oil stain, solution, dust or other pollutions.
However, existing hydraulic cylinder telescopic location is typically to be detected using displacement sensor, either above-mentioned bracing wire length
Sensor or magneto strictive sensor are spent, it has maintenance, increases telescopic oil cylinder piston displacement detection
Cost.
The content of the invention
The object of the present invention is to provide piston position detection device, method and the engineering machinery of a kind of telescopic oil cylinder, it is not
Extra displacement sensor need to be configured and can detect that piston position, piston position testing cost is greatly saved, and be not present
The problem of later stage maintains displacement sensor mechanical energy.
To achieve these goals, one embodiment of the invention provides a kind of piston position detection side of telescopic oil cylinder
Method, this method include：Receive the instruction that control cylinder piston moves in a first direction；According to the control cylinder piston
The instruction moved on one direction, determine duration that the oil cylinder piston moves in a first direction and with the oil cylinder piston
Associated displacement scale coefficient is moved in a first direction；According to the duration and displacement scale coefficient, determine described
The displacement of oil cylinder piston in a first direction；And displacement and oil cylinder work according to the oil cylinder piston in a first direction
The position before moving in a first direction is filled in, determines the current location of the oil cylinder piston.
Optionally, this method further includes：Receive the instruction that control cylinder piston moves in a second direction；According to the control
The instruction that liquefaction the cylinder piston is moved in a second direction, determine duration that the oil cylinder piston moves in a second direction with
And associated displacement scale coefficient is moved in a second direction with the oil cylinder piston；
According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a second direction is determined；With
And according to the displacement in a second direction of oil cylinder piston displacement in a first direction, the oil cylinder piston and the oil cylinder
Position before piston motion, determines the current location of the oil cylinder piston.
Optionally, duration determines according to following one or more：The input duration of described instruction；With
In the opening time of the solenoid valve of control cylinder piston motion；And continuing of flowing in one direction of hydraulic oil in the oil cylinder
Time.
Optionally, the hydraulic oil input of the telescopic oil cylinder inputs for constant current.
Correspondingly, one embodiment of the invention also provides a kind of piston position detection device of telescopic oil cylinder, which includes：
Reception device, the instruction moved in a first direction for receiving control cylinder piston；And control device, it is following for performing
Operation：The instruction moved in a first direction according to the control cylinder piston, determines the oil cylinder piston in a first direction
The duration of movement and associated displacement scale coefficient is moved in a first direction with the oil cylinder piston；Held according to described
Continuous time and displacement scale coefficient, determine the displacement of the oil cylinder piston in a first direction；And according to the oil cylinder piston
Displacement and the oil cylinder piston in a first direction move in a first direction before position, determine the oil cylinder piston
Current location.
Optionally, the reception device is additionally operable to receive the instruction that control cylinder piston moves in a second direction；It is described
Control device is additionally operable to perform following operation：The instruction moved in a second direction according to the control cylinder piston, determines institute
State the duration and moved in a second direction with the oil cylinder piston associated that oil cylinder piston moves in a second direction
Displacement scale coefficient；According to the duration and displacement scale coefficient, the position of the oil cylinder piston in a second direction is determined
Move；And according to the displacement in a second direction of oil cylinder piston displacement in a first direction, the oil cylinder piston and institute
The position before cylinder piston motion is stated, determines the current location of the oil cylinder piston.
Optionally, duration determines according to following one or more：The input duration of described instruction；With
In the opening time of the solenoid valve of control cylinder piston motion；And continuing of flowing in one direction of hydraulic oil in the oil cylinder
Time.
Optionally, the hydraulic oil input of the telescopic oil cylinder inputs for constant current.
Correspondingly, one embodiment of the invention also provides a kind of engineering machinery, which includes above-mentioned telescopic oil cylinder
Piston position detection device.
Through the above technical solutions, its piston displacement and position directly can be judged according to the control instruction of telescopic oil cylinder,
The detection for determine piston displacement and position, being applicable to that required precision is not high and cost is low is avoided using displacement sensor
In demand.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Attached drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structure diagram of the piston position detection device for the telescopic oil cylinder that one embodiment of the invention provides；
Fig. 2 is the piston position detection method flow chart for the telescopic oil cylinder that one embodiment of the invention provides；And
Fig. 3 is the piston position detection method flow chart for the telescopic oil cylinder that another embodiment of the present invention provides.
Description of reference numerals
10 reception device, 20 control device
Embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 is the structure diagram of the piston position detection device for the telescopic oil cylinder that one embodiment of the invention provides.Such as Fig. 1
Shown, one embodiment of the invention provides a kind of piston position detection device of telescopic oil cylinder, which includes：Reception device 10,
The instruction moved in a first direction for receiving control cylinder piston；And control device 20, for performing following operation：Root
The instruction moved in a first direction according to the control cylinder piston, determines that what the oil cylinder piston moved in a first direction holds
Continue the time and move associated displacement scale coefficient in a first direction with the oil cylinder piston；According to the duration and
Displacement scale coefficient, determines the displacement of the oil cylinder piston in a first direction；And according to the oil cylinder piston in first party
Upward displacement and the oil cylinder piston move in a first direction before position, determine the present bit of the oil cylinder piston
Put.Thereby, can not against extra displacement sensor and the control instruction of direct basis telescopic oil cylinder is obtained in a manner of calculating
Piston displacement and position, save the cost and its maintenance cost of displacement sensor, it is proposed that a kind of new telescopic oil cylinder
Piston position detection scheme.
Wherein, duration can determine according to following one or more：The input duration of described instruction, example
As being used for for the button on operation console or the operating time of touch-screen, for example user for for control cylinder piston the
The Continued depression time of a certain button of one direction movement；When being turned on and off of solenoid valve for control cylinder piston motion
Between, it can be detected by corresponding current sensing means, for example can detect to apply by the current sensing means and extremely should
The duration of a certain electric current more than its starting current threshold value of solenoid valve；And hydraulic oil is in one direction in the oil cylinder
The duration of flowing, such as can be more than by flow monitoring device to detect the flow of hydraulic oil in a first direction in oil cylinder
The duration of a certain predetermined amount of flow.Certainly, the present invention is not limited thereto, other can determine that the oil cylinder piston in a first direction
The mode of the duration of upper movement can be also applicable in, such as the finger that the control cylinder piston moves in a first direction
Control cylinder piston can be included in order in a first direction with the relevant parameter of the duration of a certain speed movement, can be passed through
Directly read the relevant parameter and determine the duration that the oil cylinder piston moves in a first direction.
It is described to move associated displacement scale coefficient in a first direction with the oil cylinder piston as reflection and oil cylinder work
The plug related coefficient of movement velocity in a first direction, it can be constant or variable, or the function of variable, the tool with oil cylinder
Body relating to parameters.For example, for telescopic oil cylinder of the hydraulic oil input for constant current input, should be with the oil cylinder piston in first party
The associated displacement scale coefficient of movement can be the normal of a telescopic oil cylinder inner carrier movement velocity for reflecting constant current input upwards
Amount.Oil cylinder piston the different periods within the duration can also be moved at different rates in a first direction, this
Sample calculates oil cylinder piston in the different periods respectively according to the duration and its corresponding movement velocity of the different periods
Displacement, and the displacement summations of the different periods is calculated using the displacement as the oil cylinder piston in a first direction.
Above describe and moved in one direction according to oil cylinder piston and determine the displacement of the oil cylinder piston and the side of position
Case, however in practice, what oil cylinder piston always moved back and forth, i.e., it is also needed in second party opposite to the first direction
Movement upwards.In order to determine the displacement of oil cylinder piston and position, the reception device is additionally operable to receive control cylinder piston the
The instruction moved on two directions；The control device is additionally operable to perform following operation：According to the control cylinder piston second
The instruction moved on direction, determines duration and exist with the oil cylinder piston that the oil cylinder piston moves in a second direction
Associated displacement scale coefficient is moved in second direction；According to the duration and displacement scale coefficient, the oil is determined
The displacement of the cylinder piston in a second direction；And according to oil cylinder piston displacement in a first direction, the oil cylinder piston
Position before displacement in a second direction and the cylinder piston motion, determines the current location of the oil cylinder piston.
Fig. 3 shows that the situation for the control cylinder piston motion in the two directions determines that the displacement of oil cylinder piston is put
Flow chart.As shown in figure 3, the oil cylinder piston in telescopic oil cylinder can move in the first direction and a second direction.When the oil cylinder
When piston moves in a first direction, corresponding displacement scale coefficient can be k1；When the oil cylinder piston is moved in second direction,
Corresponding displacement scale coefficient can be k2.When carrying out telescopic oil cylinder inner cylinder piston displacement detection operation, current location note
For L.If operator's control cylinder piston moves in a first direction, the detectable duration controlled in the first direction
T1, will undergo the oil cylinder piston displacement after duration t1 and is calculated as L1=t1*k1, and t2 is then 0, L2=0, then by L1 assignment
To L=L1+L2；If operator's control cylinder piston moves in a second direction, what detection controlled in the second direction
Duration t2, is calculated as L2=t2*k2, t1 is then 0, L1=0, then L2 is assigned to L=L1+ by the position after the t2 times
L2.Above-mentioned displacement scale coefficient k1 and k2 can be different, since oil cylinder has size chamber, when first direction and second direction move
Oil cylinder advance speed it is inconsistent, therefore, complete the stroke of equal length, in a first direction with the time needed for second direction
It is inconsistent, so as to cause displacement scale coefficient k1 and k2 also inconsistent.
Fig. 2 is the piston position detection method flow chart for the telescopic oil cylinder that one embodiment of the invention provides.As shown in Fig. 2,
One embodiment of the invention also provides a kind of piston position detection method of telescopic oil cylinder, and this method comprises the following steps：
S210, receives the instruction that control cylinder piston moves in a first direction；
S220, the instruction moved in a first direction according to the control cylinder piston, determines the oil cylinder piston
Duration for being moved on one direction and associated displacement scale coefficient is moved in a first direction with the oil cylinder piston；
S230, according to the duration and displacement scale coefficient, determines the position of the oil cylinder piston in a first direction
Move；And
S240, is moved in a first direction according to oil cylinder piston displacement in a first direction and the oil cylinder piston
Position before, determines the current location of the oil cylinder piston.
Optionally, this method further includes：Receive the instruction that control cylinder piston moves in a second direction；According to the control
The instruction that liquefaction the cylinder piston is moved in a second direction, determine duration that the oil cylinder piston moves in a second direction with
And associated displacement scale coefficient is moved in a second direction with the oil cylinder piston；
According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a second direction is determined；With
And according to the displacement in a second direction of oil cylinder piston displacement in a first direction, the oil cylinder piston and the oil cylinder
Position before piston motion, determines the current location of the oil cylinder piston.
Optionally, duration determines according to following one or more：The input duration of described instruction；With
In the opening time of the solenoid valve of control cylinder piston motion；And continuing of flowing in one direction of hydraulic oil in the oil cylinder
Time.
Optionally, the hydraulic oil input of the telescopic oil cylinder inputs for constant current.
The detail and benefit of piston position detection method in relation to telescopic oil cylinder provided in an embodiment of the present invention, can join
The description of the above-mentioned piston position detection device for telescopic oil cylinder is read, is repeated no more in this.
Correspondingly, one embodiment of the invention also provides a kind of engineering machinery, which includes above-mentioned telescopic oil cylinder
Piston position detection device.The engineering machinery can be paver, and the telescopic oil cylinder can be stretching for hydraulic telescopic type screed
Contracting oil cylinder or lift cylinder, layback locking oil cylinder, leveling cyclinder for connecting host and screed.Certainly, it is of the invention
It is not limited to this, present invention can be suitably applied to any telescopic oil cylinder and the engineering machinery using the telescopic oil cylinder, such as concrete pump
Car, crane, road roller, excavator etc..
Through the above technical solutions, its piston displacement and position directly can be judged according to the control instruction of telescopic oil cylinder,
The detection for determine piston displacement and position, being applicable to that required precision is not high and cost is low is avoided using displacement sensor
In demand.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (9)
1. the piston position detection method of a kind of telescopic oil cylinder, it is characterised in that this method includes：
Receive the instruction that control cylinder piston moves in a first direction；
The instruction moved in a first direction according to the control cylinder piston, determines that the oil cylinder piston is transported in a first direction
Dynamic duration and associated displacement scale coefficient is moved in a first direction with the oil cylinder piston, the displacement ratio system
Number is reflection and the oil cylinder piston related coefficient of movement velocity in a first direction；
According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a first direction is determined；And
Position before being moved in a first direction according to oil cylinder piston displacement in a first direction and the oil cylinder piston
Put, determine the current location of the oil cylinder piston.
2. the piston position detection method of telescopic oil cylinder according to claim 1, it is characterised in that this method further includes：
Receive the instruction that control cylinder piston moves in second direction opposite to the first direction；
The instruction moved in a second direction according to the control cylinder piston, determines that the oil cylinder piston is transported in a second direction
Dynamic duration and associated displacement scale coefficient is moved in a second direction with the oil cylinder piston, the displacement ratio system
Number is reflection and the oil cylinder piston related coefficient of movement velocity in a second direction；
According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a second direction is determined；And
According to the displacement in a second direction of oil cylinder piston displacement in a first direction, the oil cylinder piston and the oil
Position before the cylinder piston movement, determines the current location of the oil cylinder piston.
3. the piston position detection method of telescopic oil cylinder according to claim 1 or 2, it is characterised in that when described lasting
Between determined according to following one or more：
The input duration of described instruction；
Opening time for the solenoid valve of control cylinder piston motion；And
The duration that hydraulic oil flows in one direction in the oil cylinder.
4. the piston position detection method of telescopic oil cylinder according to claim 1, it is characterised in that the telescopic oil cylinder
Hydraulic oil input inputs for constant current.
5. the piston position detection device of a kind of telescopic oil cylinder, it is characterised in that the equipment includes：
Reception device, the instruction moved in a first direction for receiving control cylinder piston；And
Control device, for performing following operation：
The instruction moved in a first direction according to the control cylinder piston, determines that the oil cylinder piston is transported in a first direction
Dynamic duration and associated displacement scale coefficient is moved in a first direction with the oil cylinder piston, the displacement ratio system
Number is reflection and the oil cylinder piston related coefficient of movement velocity in a first direction；
According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a first direction is determined；And
Position before being moved in a first direction according to oil cylinder piston displacement in a first direction and the oil cylinder piston
Put, determine the current location of the oil cylinder piston.
6. the piston position detection device of telescopic oil cylinder according to claim 5, it is characterised in that
The reception device is additionally operable to receive what control cylinder piston moved in second direction opposite to the first direction
Instruction；
The control device is additionally operable to perform following operation：
The instruction moved in a second direction according to the control cylinder piston, determines that the oil cylinder piston is transported in a second direction
Dynamic duration and associated displacement scale coefficient is moved in a second direction with the oil cylinder piston, the displacement ratio system
Number is reflection and the oil cylinder piston related coefficient of movement velocity in a second direction；
According to the duration and displacement scale coefficient, the displacement of the oil cylinder piston in a second direction is determined；And
According to the displacement in a second direction of oil cylinder piston displacement in a first direction, the oil cylinder piston and the oil
Position before the cylinder piston movement, determines the current location of the oil cylinder piston.
7. the piston position detection device of the telescopic oil cylinder according to claim 5 or 6, it is characterised in that when described lasting
Between determined according to following one or more：
The input duration of described instruction；
Opening time for the solenoid valve of control cylinder piston motion；And
The duration that hydraulic oil flows in one direction in the oil cylinder.
8. the piston position detection device of telescopic oil cylinder according to claim 5, it is characterised in that the telescopic oil cylinder
Hydraulic oil input inputs for constant current.
9. a kind of engineering machinery, it is characterised in that the engineering machinery is included according to any one of claim 5-8 claim institute
The piston position detection device for the telescopic oil cylinder stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611160225.9A CN106402092B (en) | 2016-12-15 | 2016-12-15 | Piston position detection device, method and the engineering machinery of telescopic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611160225.9A CN106402092B (en) | 2016-12-15 | 2016-12-15 | Piston position detection device, method and the engineering machinery of telescopic oil cylinder |
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| Publication Number | Publication Date |
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| CN106402092A CN106402092A (en) | 2017-02-15 |
| CN106402092B true CN106402092B (en) | 2018-05-04 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202468547U (en) * | 2011-12-20 | 2012-10-03 | 中联重科股份有限公司 | Telescoping cylinder and stroke detection apparatus thereof |
| JP5282138B2 (en) * | 2011-12-09 | 2013-09-04 | ヤマハ発動機株式会社 | Actuator control device, control method, and actuator drive time measurement method |
| CN103671308A (en) * | 2013-12-12 | 2014-03-26 | 中联重科股份有限公司 | Hydraulic control device, method and system and engineering machine |
| CN105840587A (en) * | 2015-01-12 | 2016-08-10 | 中联重科股份有限公司 | Oil adding/drainage control device, system, method for pumping device and engineering machine |
-
2016
- 2016-12-15 CN CN201611160225.9A patent/CN106402092B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5282138B2 (en) * | 2011-12-09 | 2013-09-04 | ヤマハ発動機株式会社 | Actuator control device, control method, and actuator drive time measurement method |
| CN202468547U (en) * | 2011-12-20 | 2012-10-03 | 中联重科股份有限公司 | Telescoping cylinder and stroke detection apparatus thereof |
| CN103671308A (en) * | 2013-12-12 | 2014-03-26 | 中联重科股份有限公司 | Hydraulic control device, method and system and engineering machine |
| CN105840587A (en) * | 2015-01-12 | 2016-08-10 | 中联重科股份有限公司 | Oil adding/drainage control device, system, method for pumping device and engineering machine |
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| CN106402092A (en) | 2017-02-15 |
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